CN118396569B - Resource accounting method of downstream logistics mode based on equivalent flow - Google Patents

Abstract

The invention relates to a method for calculating resources in a forward building logistics mode based on equivalent flow, namely measuring and calculating logistics resources in each operation flow of the forward building logistics mode, namely measuring and calculating logistics resources consumed by unloading and emptying links, checking and accepting and warehousing links, ex-warehouse transferring links, stock picking links and on-line links in the forward building logistics mode, finding out intermediate conversion variables in logistics resource consumption by decomposing the operation flow of the forward building logistics mode, constructing a logistics resource calculation model by considering the influence of stock unit differentiation influence of a forward building secondary storage area on the equivalent flow, and finally realizing logistics resource calculation under the forward modeling mode from each link. The invention has the advantages that: the equivalent physical quantity is used as the calculation basis of the intermediate conversion variable, and the accurate calculation of the intermediate conversion variable and the equivalent flow calculation of the stock unit differentiation influence caused by the sequential construction secondary storage are considered, so that the theoretical interpretation and accuracy of the logistics resource calculation result are enhanced.

Description

A resource accounting method for Shunjian logistics model based on equivalent logistics volume

Technical Field

The present invention belongs to the field of lean accounting of production logistics resources, and in particular relates to a Shunjian logistics model resource accounting method based on equivalent logistics volume under the Shunjian logistics model.

Background Art

Shunjian Logistics Model is a logistics management model that is customer-oriented and based on information technology. It means that after the parts enter the factory, they are rearranged in the order of the production models of the production line, or the parts that are initially processed on the secondary line of the relevant project are brought to the main line in order. Its operation process covers all aspects from order receipt, warehouse management, inventory control, distribution planning to logistics tracking.

Therefore, the standard operations of each process and the logistics resources consumed (personnel, process vehicles and occupied area) are diverse in type, huge in quantity and high in related logistics costs. The existing lean accounting method for logistics resources is based on the total operation time and standard operation time, and does not consider the precise calculation of intermediate conversion variables and their impact on the accounting results, resulting in a lack of theoretical explanation and accuracy in the accounting results.

Problems with existing technologies:

1. Its existing lean accounting method for logistics resources is based on the total operation time and standard operation time, and does not consider the precise calculation of intermediate conversion variables and their impact on the accounting results, resulting in a lack of theoretical explanation and accuracy in the accounting results.

Chang Xiaolong. Research on the optimization and simulation of production workshop facilities planning of Company A has been reported. Chengdu University of Technology (2016) proposed that the product of demand and handling coefficient can be used to obtain the monthly equivalent logistics volume between each operation unit as the basis for analyzing the logistics relationship of the operation unit. However, the impact of intermediate transfer variables related to demand on the equivalent logistics volume was not considered. The reported "Logistics distribution system for product production links and logistics cost accounting method thereof", patent publication number CN109993483A, considers using GPS positioning terminals, RFID electronic tags attached to products, and mobile smart terminals used by different personnel, and using collection equipment to collect the costs of various departments in the process of product production and transportation and the cost information of vehicles during transportation in real time. Various costs are broken down into various links, such as management labor costs, warehousing labor costs, picking labor costs, etc., but the resource consumption details corresponding to the costs are not given. In the calculation of equivalent logistics volume, the role of intermediate transfer variables, that is, the impact of intermediate transfer variables on logistics resource consumption, and their application in the accounting of logistics resources are not considered.

2. The existing logistics resource accounting method based on equivalent logistics volume does not take into account the impact of the differentiation of stocking units caused by different storage methods on the equivalent logistics volume.

Chang Jiang, reported. Lean logistics design for body parts welding enterprises based on Flexsim, Master's thesis of Shenyang University of Technology (2022), proposed that combining the two factors of material packaging and handling equipment to construct an equivalent logistics volume calculation model can better represent the logistics relationship between each operation unit. The total logistics volume between each pair of operation units can be calculated based on the equivalent logistics volume between the operation units. From the perspective of spatial layout, the workshop layout plan can be accurately adjusted to reduce logistics handling costs. The calculation of equivalent logistics volume without considering the impact of stocking unit differentiation and its impact on logistics resource accounting.

3. Among the four existing production logistics models, the Shunjian logistics model has a good flow of operations. However, in the entire flow of operations, due to the existence of secondary storage problems and picking and preparing goods according to the production sequence, the Shunjian logistics model is dependent on the floor plan of the factory, with the most types of operations, the highest timeliness requirements, and the highest point-to-point accuracy requirements. This results in the Shunjian logistics model's information flow being very accurate and having the foundation for lean accounting.

The reported Wan Shiqi. Research on the Optimization of Cost Accounting of CH Logistics Company Based on Activity-Based Costing, Master's Thesis of Guangdong University of Technology (2022) Based on the activity-based costing method, the operation center is divided into: order management, cargo transportation, acceptance and storage operation links, warehousing management, cargo outbound and cargo distribution, and the specific resource consumption is calculated and aggregated. However, only the cost and allocation of logistics resources are considered, and the accounting of logistics resources consumed under the Shunjian logistics model is not considered. The reported Wang Qianqian. Research on the Optimization of Logistics Cost Calculation and Distribution Method of FAW Car Assembly Line, Master's Thesis of Jilin University (2011) proposed that the cost calculation under the Shunjian logistics method is based on the specific process of the Shunjian logistics method, and the logistics cost calculation method based on the logistics cost project is used as the calculation method. With the project as the carrier, it is determined whether each project is within the calculation range and the algorithm of each project according to the specific process of the Shunjian logistics method. The Shunjian logistics model in the factory is disassembled into warehousing cost, loading and unloading cost, logistics information cost, logistics management cost, and capital occupation cost, without considering the detailed consideration of the operation process of the Shunjian logistics model and the consumption of various logistics resources.

Summary of the invention

In view of the above problems, the purpose of the present invention is to provide a resource accounting method for a Shunjian logistics model based on equivalent logistics volume, which is used to calculate the equivalent logistics volume considering the differentiated impact of stocking units caused by different storage methods, and through intermediate conversion variables, clarify the precise calculation and application of intermediate conversion variables such as single vehicle quotas and parts packaging volumes, and realize the lean accounting of logistics resources under the Shunjian logistics model. And, the proposed logistics resource accounting method can be in the Shunjian model, by using equivalent logistics volume, the logistics volume of different operations can be uniformly measured, reducing the impact of operational complexity and differences. Help enterprises better manage logistics resources, and provide guidance for subsequent logistics resource planning by comparing and analyzing with actual on-site operations.

To achieve the above object, the present invention adopts the following technical solution:

A resource accounting method for a Shunjian logistics model based on equivalent logistics volume specifically comprises the following steps:

S1: Analysis of Shunjian logistics model operation process and logistics resources,

In the Shunjian logistics model operation, there are five main links, namely, unloading and returning, acceptance and storage, outbound transfer, stock preparation and picking, and online. By disassembling the operation process of each link, the flow direction of parts in each link and the consumed logistics resources are determined;

S2: Data collection and compilation,

Obtain automobile production plans and parts original unit information through data collection, and establish Shunjian parts information database;

S3: Construction of accounting model considering the differentiated impact of stocking units in Shunjian secondary storage,

According to the activity-based costing method, by calculating the operation time T and the planned working time _Ts , the planning value of various logistics resources is obtained. Since workers cannot work at full capacity, it is divided by the specified operation load rate λ to obtain the logistics resource accounting value. The various process vehicles required during the operation can be determined according to the number of operators, and the logistics mode accounting model is built accordingly;

S4: Calculate the logistics resources of each link in the construction.

Shunjian Logistics Resource Calculation includes the following five links: unloading and returning, acceptance and storage, outbound transfer, stock preparation and picking, and online launch;

S5: Shunjian Logistics Resource Allocation Strategy is proposed.

Since automobile production plans will change over time, while the configuration of operators in each link of the site is fixed, this will lead to different workloads for operators, that is, the operating load rate is not consistent. By measuring the logistics resources of each link, the logistics resources required for each link under a certain operating load rate can be accurately determined, which can be used to propose logistics resource allocation strategies. Based on the analysis of Shunjian’s logistics resource accounting value and the actual number of employees, a personnel structural configuration optimization strategy can be formulated.

As a preferred embodiment of the present invention, in the Shunjian logistics mode of step S1, the operation areas of the logistics resources consumed in each link are as follows:

By disassembling the operation process of the five links, the flow direction of the parts in the five links and the consumed logistics resources are determined. Among them, the operation areas of the logistics resources consumed in each link are as follows:

The unloading and empty return process involves three areas: the unloading port parking area, the acceptance area, and the empty container sorting area. The forklift at the unloading port parking area places the delivered parts in the acceptance area, and the forklift at the empty container sorting area returns the empty containers in the empty container sorting area to the parts manufacturer, and unloads the empty containers brought by the tractor from the Shunjian yard in the empty container sorting area;

The acceptance and warehousing process involves the acceptance area, the loading port of the large three-dimensional warehouse, and the stacking area. The acceptance personnel need to inspect the parts sent by the manufacturer. After the acceptance is completed, the forklift will deliver the parts to a specific storage area, namely the loading port and stacking area of the large three-dimensional warehouse; the outbound transportation process involves the unloading port of the three-dimensional warehouse, the stacking area, the temporary storage area to be shipped, the Shunjian stocking area, and the empty box sorting area. After receiving the parts, the forklift will take them off the shelf from the three-dimensional warehouse and transport them to the temporary storage area to be shipped. The parts in the stacking area are waiting for the tractor to transfer them and do not need to be transported to the temporary storage area to be shipped. After the forklift places the parts on the tractor's equipment car, the tractor will send them to the secondary storage area. In the Shunjian logistics model, the secondary storage area is the Shunjian yard. After the tractor delivers the parts to the secondary storage area, the tractor will transport the empty boxes to the empty box sorting area and carry out the next parts transportation;

The stock picking process involves the information points, empty equipment storage area, picking area, and waiting area within the Shunjian yard, and is mainly carried out by picking personnel;

The online process involves the waiting area and line-side storage area of the Shunjian yard. The tractor mounts the towing equipment vehicle in the waiting area of the Shunjian yard, transports the parts to the line-side storage area, and transports the empty equipment vehicle in the line-side storage area back to the Shunjian yard.

As a preferred embodiment of the present invention, in step S2, the following steps are also included:

A1: Data collection,

According to the logistics execution system and manufacturing operation management system of the automobile manufacturer, the automobile production plan and original unit information of the parts of the enterprise are obtained, wherein the automobile models and the production volume of each model are extracted from the automobile production plan, the part number, the size of the part packaging box (L: length, W: width, H: height), the number of parts accommodated U, the storage method, the supply method are extracted from the original unit information library of the parts, and the part number and the number of equipment vehicles accommodated C are extracted from the MOM system; the single vehicle usage q of various parts required;

A2: Establish Shunjian parts information database,

By collecting the original unit information of parts and automobile production information, we screen out the parts required for the production of each model of automobile according to the automobile model. Then, based on the supply method, we screen out the parts required for operations under the Shunjian logistics model, obtain the information of the required parts, and establish a Shunjian parts information database.

As a preferred embodiment of the present invention, in step S3, the logistics mode calculation model is as follows:

C1: Calculation of operation duration,

When calculating the operation time T, it is regarded as the product of the operation time and the equivalent logistics volume. The operation time is regarded as the sum of the unit operation time and the parts transportation time _Ty . The transportation time is calculated by the operation distance and the operation speed. Among them, the operation distance is determined according to the operation area of each link under the Shunjian logistics model. The operation speed includes: forklift driving speed _vc , tractor driving speed _vq , personnel walking speed _vr ,

The unit operation time is calculated by the MTM time measurement method. By decomposing and summarizing the operation process of each link, the standard value of each unit operation time is determined. The unit standard operation time is divided into the following time according to the operator:

The unit time for code scanning operation T _sm involved in acceptance inspection refers to the unit time for code scanning inspection by the acceptance personnel; the unit time for appearance inspection T _cd refers to the unit time for the acceptance personnel to check whether the parts packaging box is intact; the unit time for arrival quantity confirmation T _dh refers to the unit time for the acceptance personnel to confirm the arrival quantity;

The unit time of forklift operation T _C is the unit time required for the forklift to lift and put down the goods.

The tractor time involves the unit operation time T _GZ of the equipment mounting when performing the operation, which refers to the unit operation time required for the tractor to untie and connect the new pallet truck when performing an empty and full equipment exchange; the unit operation time T _TQJ of the equipment delivery refers to the unit operation time required to deliver the equipment truck to the line-side storage area;

The unit time T _DY for printing instruction tickets when picking personnel are working refers to the unit operation time for picking personnel to log in to the system to print instruction tickets; the unit operation time T _FJ for picking parts refers to the unit time required for picking personnel to pick a part from the parts packaging box and place it in the tool cart;

C2: Calculation of equivalent logistics volume considering the differentiated impact of stocking units in Shunjian secondary storage,

(1) Calculation of equivalent material flow rate stored once,

Since one-time storage does not involve unpacking and picking operations, the parts transfer method is full box transfer. Therefore, when converting the equivalent logistics volume, the number of parts stacks is used as the equivalent logistics volume. The operation involves unloading and returning, acceptance and storage operations, and outbound transfer. When calculating the number of parts stacks, the model production ratio, part single vehicle quota, part packaging volume, and the number of equipment vehicles are used for calculation, and converted into standard stacks as the equivalent logistics volume, which is helpful for the subsequent calculation of the operation time required for parts operation, that is, the operation time of forklift and tractor logistics resources;

Calculation of model production ratio: According to the production plan, calculate the model production ratio of each model c =

[c ₁ ,c ₂ ,…,c _n ] ^T , where k _i is the number of each model scheduled for production in the production plan, and the calculation formula for the production proportion of each model is:

Calculation of single vehicle quota: based on the number of parts of each model used in different models,

And the proportion of model production is used to calculate the average number of parts of each model used in the production of a car, that is, the single vehicle quota d = [d ₁ ,d ₂ ,…,d _m ] ^T :

d=qc formula (3-4)

Calculation of parts packaging volume: Based on the volumes of various parts packaging boxes and the number of parts contained, the approximate volume of a single part of each part is calculated, that is, V = [V ₁ , V ₂ , …, V _m ] ^T is the parts packaging volume, L = [l ₁ , l ₂ , …, l _m ] ^T , W = [w ₁ , w ₂ , …, w _m ] ^T , H = [h ₁ , h ₂ , …, h _m ] ^T , are the length, width and height of the parts packaging box, and U = [u ₁ , u ₂ , …, u _m ] ^T is the number of parts contained in the packaging box, that is, the number of parts contained, and the parts packaging volume is obtained. The calculation formula is as follows:

V＝L⊙W⊙H/U Formula (3-5)

Calculation of the number of parts stacks: Based on the single vehicle quota and the parts packaging volume, as well as the vehicle model production plan, the number of parts stacks required for transfer is calculated from D = [D ₁ , D ₂ , …, D _m ] ^T . A standard stack is assumed to be one cubic meter, where n _c represents the total number of vehicles produced. The calculation formula for the number of stacks for each part is as follows:

D＝n _c d⊙V Formula (3-6)

(2) Calculation of equivalent material flow rate of secondary storage,

Calculation of the number of equipment vehicles: Shunjian logistics model requires that the stock picking process be carried out in the order of serial numbers and different parts be delivered to the production line side within the specified time. Therefore, in the stock sorting and online process, the parts need to be unpacked and picked, and different parts need to be distinguished and placed on special equipment vehicles. In these two links, the required number of equipment vehicles is used as the equivalent logistics volume. The number of equipment vehicles Z = [Z ₁ , Z ₂ , …, Z _m ] ^T , and the calculation requires the single vehicle quota, automobile displacement and the number of equipment vehicles C = [C ₁ , C ₂ , …, C _m ] ^T . The calculation formula is as follows:

Z＝n _c d/C Formula (3-7)

C3: Planned working hours refer to the working hours stipulated by the enterprise for workers.

C4: The work load rate refers to the fact that employees cannot work at full capacity during the operation. Therefore, it is necessary to calculate the work load rate to balance the work load of employees and give full play to their work capacity. When calculating logistics resources, the standard operation time and the range of work load are specified for calculation. Let the work load rate be λ.

As a preferred embodiment of the present invention, in step S4,

D1: Unloading and returning to empty space.

In this link of logistics calculation, the required operation time is calculated through the path distance S _TY from the unloading parking area to the acceptance area and the path distance S _KT from the empty container area to the unloading parking space, the unit operation time _TC of the forklift and the driving speed v _{c of} the forklift. Then, the required number of workers and forklifts are calculated through the operation time. The operation logistics resources are forklift drivers and forklifts. The calculation formula is as follows:

D2: Check and store the goods.

When calculating logistics resources in the acceptance phase, it is necessary to calculate the unit time T _cd for appearance inspection, the unit time T _dh for confirmation of arrival quantity, and the unit time T _sm for code scanning. The number of acceptance personnel can be calculated based on the number of parts stacks to be accepted and the employee's workload rate.

Due to the size of the packaging boxes, some parts are stored in the large stereoscopic warehouse, and the rest are stored in the stacking area. Therefore, when calculating the logistics resources in the warehousing link, the operating distance is the path distance S _YLK from the acceptance area to the stereoscopic warehouse and the path distance S _YDD from the acceptance area to the stacking area. Suppose there are k kinds of parts in the stereoscopic warehouse, h kinds of parts in the stacking area, k+h＝m, and the number of stacks of different parts is D _i and D _j . The operating logistics resources are forklift drivers and forklifts. The calculation formula is as follows:

D3: Outbound transfer:

The outbound link involves the problem of parts storage location. The outbound of parts in the stacking area is completed by the forklift that places the parts in the stacking area. Therefore, the logistics resources calculated in this link refer specifically to the forklift and forklift driver responsible for the outbound of parts in the large stereoscopic warehouse. The types of parts involved are the same as those stored in the stereoscopic warehouse in the inbound link, which is k. Suppose the path distance from the unloading port of the large stereoscopic warehouse to the temporary storage area to be shipped is S _XD , and the calculation formula is as follows:

In the Shunjian logistics mode, the operation process of the tractor performing the outbound transfer scene is regarded as a round trip from the Shunjian yard to the empty equipment storage area. In the Shunjian stocking area, according to the type of parts, they are transferred to different storage areas of the Shunjian yard. During this period, the tractor needs to unload empty boxes in the empty equipment storage area, load parts in the waiting area or stacking area, and exchange empty and full pallet trucks in the Shunjian stocking area. During this period, the number of pallet trucks mounted on the tractor p is involved. The distance of a cycle operation path from the empty equipment storage area to the Shunjian stocking area is S = [S ₁ ,S ₂ ,…,S _m ], the unit time of mounting a pallet truck is T _GZ , and the calculation formula is as follows:

D4: Stock picking process,

The stock picking process involves the calculation of picking personnel. Since unpacking and picking are required, the equivalent logistics volume is the number of equipment carts, which mainly involves the path distance S _XK from the information point in the Shunjian field to the empty equipment area, the path distance S _KF from the empty equipment area to the sorting area, the path distance S _FD from the sorting area to the waiting area, and the sorting area distance S _FJ . The unit operation time involved is the unit time T _DY for printing the instruction ticket and the single sorting part time T _FJ . The walking speed of the personnel is v _r . After the parts are sorted, the equipment cart needs to be pushed to the waiting area. The calculation formula is as follows:

D5: Online stage,

In the on-line link, the operation process of the tractor is regarded as transferring from each line of the Shunjian stocking area to the corresponding production line side storage area according to the type of parts. Therefore, the number of parts required to go online is calculated based on the number of equipment vehicles mounted on the tractor. The mounted equipment is generally picked and placed by the staff in the stocking area. Therefore, it is assumed that the mounted equipment trolleys are connected. During this period, the distance from the line side storage area of each production line to the Shunjian stocking area is S = [S ₁ ,S ₂ ,…,S _m ], the unit time for mounting equipment is T _GZ , and the unit operation time for placing equipment vehicles in the line side storage area is T _TQJ . The calculation formula is as follows:

By measuring the above links, the logistics resource accounting under the Shunjian logistics model based on equivalent logistics volume was completed, in which intermediate transfer variables were used as the basis for accounting, which is conducive to expanding to other logistics models and enhancing the theoretical explanatory power and accuracy of the logistics resource accounting results.

As a preferred embodiment of the present invention, in step S5, the following steps are also included:

E1: Balanced workload,

When optimizing the structural configuration of logistics resources, the calculated values of logistics resources in each link are used as a reference. When there is a certain gap between the calculated logistics resources in a certain link and the actual on-site operators, the personnel with low workload rates are assigned additional tasks through planning and design.

E2: Process Reengineering and Allocation,

Since each operation process is linked to each other, some of them have a sequence. The three links of unloading, acceptance and warehousing have a sequence, which also causes some waiting time. Based on the logistics resource accounting value and the actual number of operators, the operation process can be analyzed and optimized, and the diversity of operators' operations can be considered;

E3: Optimization of personnel structure,

Based on the logistics resource accounting results of each link and the actual number of operators, the operators are reallocated to other links. This requires comprehensive training of employees to meet the needs of dynamic allocation of employees, so that they can be competent for the operating processes of other links and realize dynamic structural adjustments of operators in each link. At the same time, this requires planners to make accurate scheduling of personnel and allocation of work tasks and eliminate workers' discomfort with job transfers.

The advantages and positive effects of the present invention are:

1. The present invention proposes to use equivalent physical quantities as the calculation basis of intermediate conversion variables, consider the accurate calculation of intermediate conversion variables and the calculation of equivalent logistics volume that takes into account the differentiated impact of stocking units caused by secondary storage, so as to enhance the theoretical explanatory power and accuracy of logistics resource accounting results.

2. The present invention realizes lean accounting of logistics resources under the through-flow of Shunjian logistics model by clarifying the calculation principles and application scenarios of intermediate conversion variables such as equivalent number of stacks, single vehicle quota, and parts packaging volume, which has guiding significance for logistics resource accounting of other logistics models.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a flow chart of the operation process of the Shunjian logistics model and its logistics resource analysis of the present invention;

Fig. 2 is a flow chart of data collection and arrangement of the present invention;

3 is a flowchart of the calculation model construction considering the differentiated impact of the stocking unit of Shunjian secondary storage of the present invention;

4 is a flow chart of logistics resource accounting for each link of Shunjian of the present invention;

FIG. 5 is a flow chart of the Shunjian logistics resource allocation strategy of the present invention.

DETAILED DESCRIPTION

The technical solution and main points of the present invention are described in detail below with reference to Figures 1-5.

This embodiment takes the logistics resource accounting based on equivalent logistics volume under the Shunjian mode as the research object. According to the operation process under the Shunjian logistics mode. It is mainly divided into unloading and returning links, acceptance and storage links, outbound transportation links, preparation and picking links, and online links. A resource accounting method based on equivalent logistics volume is proposed for the logistics resources such as personnel and forklifts consumed in each link.

This embodiment is based on the logistics resource accounting method of equivalent logistics volume. By calculating the logistics resources of each logistics resource in different operation processes, that is, calculating the logistics resources consumed in the unloading and emptying link, the acceptance and storage operation link, the outbound transfer scene link, the preparation and picking link, and the online link under the logistics Shunjian mode (logistics resources mainly include: forklifts, forklift drivers, tractors, tractor drivers, acceptance personnel and picking personnel, etc.), by decomposing the operation process of the Shunjian logistics model, finding the intermediate conversion variables in the logistics resource consumption, that is, the single vehicle quota, the parts packaging volume, and considering the differentiated impact of the stocking unit in the Shunjian secondary storage area on the equivalent logistics volume, a logistics resource accounting model is constructed, and finally the logistics resource accounting under the Shunjian mode is realized from all links.

This method specifically includes the following five steps:

S1: Analysis of Shunjian logistics model operation process and logistics resources,

In the Shunjian logistics model operation, there are five main links, namely, unloading and returning, acceptance and storage, outbound transfer, stock preparation and picking, and online. By disassembling the operation process of each link, the flow direction of parts in each link and the consumed logistics resources are determined;

The operating areas of logistics resources consumed in each link are as follows:

The unloading and returning process involves three areas: the unloading port parking area, the acceptance area, and the empty container sorting area. The forklift at the unloading port parking area places the delivered parts in the acceptance area, and the forklift at the empty container sorting area returns the empty containers in the empty container sorting area to the parts manufacturer and unloads the empty containers brought by the tractor from the Shunjian yard.

The acceptance and warehousing operation involves the acceptance area, the loading port of the large three-dimensional warehouse, and the stacking area. The acceptance personnel need to inspect the parts sent by the manufacturer. After the acceptance is completed, the forklift will deliver the parts to a specific storage area, namely the loading port and stacking area of the large three-dimensional warehouse; the outbound transportation scene involves the unloading port of the three-dimensional warehouse, the stacking area, the temporary storage area to be shipped, the Shunjian stocking area, and the empty box sorting area. After receiving the parts, the forklift will take them off the shelf from the three-dimensional warehouse and transport them to the temporary storage area to be shipped. The parts in the stacking area are waiting for the tractor and do not need to be transported to the temporary storage area to be shipped. After the forklift places the parts on the tractor's equipment car, the tractor will send them to the secondary storage area. In the Shunjian logistics model, the secondary storage area is the Shunjian yard. After the tractor delivers the parts to the secondary storage area, the tractor will transport the empty boxes to the empty box sorting area and carry out the next parts transportation;

The stock picking process involves the information points, empty equipment storage area, picking area, and waiting area within the Shunjian yard, and is mainly carried out by picking personnel;

The online process involves the waiting area and line-side storage area of the Shunjian yard. The tractor mounts the towing equipment vehicle in the waiting area of the Shunjian yard, transports the parts to the line-side storage area, and transports the empty equipment vehicle in the line-side storage area back to the Shunjian yard.

The above-mentioned specific storage area refers to: the parts operated in the Shunjian logistics model refer to the parts that are generally stored in the large three-dimensional warehouse and the stacking area during one storage. These parts have the characteristics of large size, heavy weight, many types or colors, and are closely related to vehicle models. Therefore, specific storage areas are required to ensure their safe and effective storage. Among them, the problem of parts storage area is involved in the unloading and emptying link, the warehousing inspection link, and the outbound transportation scene link.

The above-mentioned secondary storage means that these parts will be stored in Shunjian's stocking area, namely the PC area, through the Shunjian logistics model. Unpacking and picking are carried out in the Shunjian stocking area, and the parts are sent to the line-side storage area in the order of vehicle assembly within the specified time through instruction tickets. This ensures that these parts can be quickly and accurately extracted and used during the production process. Among them, the unloading and emptying link, the outbound transfer scene link, the stocking picking link and the online link involve the secondary storage of parts.

S2: Data collection and compilation,

Obtain automobile production plans and parts original unit information through data collection, and establish Shunjian parts information database;

A1: Data collection,

According to the automobile manufacturer's logistics execution system (LES) and manufacturing operations management system (MOM), the company's automobile production plan and parts original unit information are obtained, among which the scheduled automobile models and the scheduled production volume of each model are extracted from the automobile production plan, and the part number, part packaging box size (L: length, W: width, H: height), part storage number U, storage method (primary storage: large object stereoscopic warehouse, stacking area; secondary storage: sequential building preparation area), supply method (L1: sequential; L2: batch; L3: sequential building; L4: SPS) are extracted from the parts original unit information library, and the part number, equipment vehicle storage number C; the single vehicle usage q of various parts required are extracted from the MOM system.

A2: Establish Shunjian parts information database,

By collecting the original unit information of parts and automobile production information, the parts required for the production of each model of automobile are screened out according to the automobile model. Then, according to the supply method (L3), the parts required for operations under the Shunjian logistics model are screened out, and the information of the required parts, such as the number of parts to be accommodated, the size of the packaging box, etc., are obtained to establish a Shunjian parts information database.

S3: Construction of accounting model considering the differentiated impact of stocking units in Shunjian secondary storage,

According to the activity-based costing method, by calculating the operation time T (the time required to complete an operation process multiplied by the equivalent logistics volume, the operation time required for the production planning of automobile output) and the planned working time _Ts , the planning value of various logistics resources is obtained. Since workers cannot work at full capacity, the logistics resource accounting value can be obtained by dividing it by the specified operation load rate λ. The various process vehicles required during the operation can be determined according to the number of operators, and the logistics mode accounting model is built accordingly;

The logistics mode accounting model is as follows:

C1: Calculation of operation duration,

When calculating the operation time T, it can be regarded as the product of the operation time and the equivalent logistics volume. The operation time can be regarded as the sum of the unit operation time and the parts transportation time _Ty . The transportation time is calculated by the operation distance and the operation speed. Among them, the operation distance is determined according to the operation area of each link under the Shunjian logistics model. The operation speed includes: forklift driving speed _vc , tractor driving speed _vq , personnel walking speed _vr ,

The unit operation time can be calculated by the MTM time measurement method. By decomposing and summarizing the operation process of each link, the standard value of each unit operation time is determined. The unit standard operation time can be divided into the following time according to the operator:

The unit time for code scanning operation T _sm involved in acceptance inspection refers to the unit time for code scanning inspection by the acceptance personnel; the unit time for appearance inspection T _cd refers to the unit time for the acceptance personnel to check whether the parts packaging box is intact; the unit time for arrival quantity confirmation T _dh refers to the unit time for the acceptance personnel to confirm the arrival quantity;

The unit time of forklift operation T _C is the unit time required for the forklift to lift and put down the goods.

The tractor time involves the unit operation time T _GZ of the equipment mounting when performing the operation, which refers to the unit operation time required for the tractor to untie and connect the new pallet truck when performing an empty and full equipment exchange; the unit operation time T _TQJ of the equipment delivery refers to the unit operation time required to deliver the equipment truck to the line-side storage area;

The unit time T _DY for printing instruction tickets when picking personnel are working refers to the unit operation time for picking personnel to log in to the system to print instruction tickets; the unit operation time T _FJ for picking parts refers to the unit time required for picking personnel to pick a part from the parts packaging box and place it in the tool cart;

C2: Calculation of equivalent logistics volume considering the differentiated impact of stocking units in Shunjian secondary storage,

(1) Calculation of equivalent material flow rate stored once,

Since one-time storage does not involve unpacking and picking operations, and the parts transfer method is full-box transfer, the number of parts stacks can be used as the equivalent logistics volume when converting the equivalent logistics volume. The links involved in the operation include unloading and returning, acceptance and storage operations, and outbound transfer scenarios. When calculating the number of parts stacks, the model production ratio, the parts single vehicle quota, the parts packaging volume, and the number of equipment vehicles can be used for calculation, and converted into standard stacks as the equivalent logistics volume, which is helpful for the subsequent calculation of the operating time required for parts operations, that is, the operating time of forklift and tractor logistics resources;

Calculation of model production ratio: According to the production plan, calculate the model production ratio of each model c =

[c ₁ ,c ₂ ,…,c _n ] ^T , where k _i is the number of each model scheduled for production in the production plan, and the calculation formula for the production proportion of each model is:

Calculation of single vehicle quota: based on the number of parts of each model used in different models,

And the proportion of model production is used to calculate the average number of parts of each model used in the production of a car, that is, the single vehicle quota d = [d ₁ ,d ₂ ,…,d _m ] ^T :

d=qc formula (3-4)

Calculation of parts packaging volume: Based on the volumes of various parts packaging boxes and the number of parts contained, the approximate volume of a single part of each part is calculated, that is, V = [V ₁ , V ₂ , …, V _m ] ^T is the parts packaging volume, L = [l ₁ , l ₂ , …, l _m ] ^T , W = [w ₁ , w ₂ , …, w _m ] ^T , H = [h ₁ , h ₂ , …, h _m ] ^T , are the length, width and height of the parts packaging box, and U = [u ₁ , u ₂ , …, u _m ] ^T is the number of parts contained in the packaging box, that is, the number of parts contained, and the parts packaging volume is obtained. The calculation formula is as follows:

V＝L⊙W⊙H/U Formula (3-5)

Calculation of parts stacks: Based on the vehicle quota and parts packaging volume, as well as the vehicle model production plan, the number of parts stacks required for transfer can be calculated from D = [D ₁ , D ₂ , …, D _m ] ^T . A standard stack is assumed to be one cubic meter, where n _c represents the total vehicle production volume. The calculation formula for the number of stacks for each part is as follows:

D＝n _c d⊙V Formula (3-6)

(2) Calculation of equivalent material flow rate of secondary storage,

Calculation of the number of equipment vehicles: Shunjian logistics model requires that different parts be delivered to the production line within the specified time by picking and preparing goods in the order of serial numbers. Therefore, in the stocking sorting and on-line links, the parts need to be unpacked and picked, and different parts (parts of the same model may have differences in color, etc.) need to be distinguished and placed on special equipment vehicles. In these two links, the required number of equipment vehicles Z = [Z ₁ , Z ₂ , …, Z _m ] ^T is used as the equivalent logistics volume. The calculation of the number of equipment vehicles requires the single vehicle quota, automobile displacement and the number of equipment vehicles C = [C ₁ , C ₂ , …, C _m ] ^T. The calculation formula is as follows:

Z＝n _c d/C Formula (3-7)

C3: Planned working hours refer to the working hours stipulated by the enterprise for workers.

C4: The work load rate refers to the fact that employees cannot work at full capacity during the operation. Therefore, it is necessary to calculate the work load rate to balance the work load of employees and give full play to their work capacity. When calculating logistics resources, the standard operation time and the range of work load can be specified for calculation. Let the work load rate be λ.

S4: Calculate the logistics resources of each link in the construction.

The scenario logistics resources are calculated in the following five links: unloading and returning, acceptance and storage, outbound transfer, stock preparation and picking, and online.

D1: Unloading and returning to empty space.

In this link of logistics calculation, the required operation time is calculated through the path distance S _TY from the unloading parking area to the acceptance area and the path distance S _KT from the empty container area to the unloading parking space, the unit operation time _TC of the forklift and the driving speed v _{c of} the forklift. Then, the required number of workers and forklifts are calculated through the operation time. The operation logistics resources are forklift drivers and forklifts. The calculation formula is as follows:

D2: Check and store the goods.

When calculating logistics resources in the acceptance phase, it is necessary to calculate the unit time T _cd for appearance inspection, the unit time T _dh for confirmation of arrival quantity, and the unit time T _sm for code scanning. The number of acceptance personnel can be calculated based on the number of parts stacks to be accepted and the employee's workload rate.

Due to the size of the packaging boxes, some parts can be stored in the large stereoscopic warehouse, and the rest are stored in the stacking area, which are usually special-sized parts. Therefore, when calculating the logistics resources in the warehousing link, the operating distance is the path distance S _YLK from the acceptance area to the stereoscopic warehouse and the path distance S _YDD from the acceptance area to the stacking area. Suppose there are k kinds of parts in the stereoscopic warehouse, h kinds in the stacking area (k+h＝m), and the number of stacks of different parts is D _i and D _j . The operating logistics resources are forklift drivers and forklifts. The calculation formula is as follows:

D3: Outbound transfer:

The outbound link involves the problem of parts storage location. The outbound of parts in the stacking area is completed by the forklift that places the parts in the stacking area. Therefore, the logistics resources calculated in this link refer specifically to the forklift and forklift driver responsible for the outbound of parts in the large three-dimensional warehouse. The types of parts involved are the same as those stored in the three-dimensional warehouse in the inbound link, which is k. Suppose the path distance from the unloading port of the large three-dimensional warehouse to the temporary storage area to be shipped is S _XD , and the calculation formula is as follows:

In the Shunjian logistics mode, the operation process of the tractor performing the outbound transfer scene can be regarded as a round trip from the Shunjian yard to the empty equipment storage area. In the Shunjian stocking area, according to the type of parts, they are transferred to different storage areas of the Shunjian yard. During this period, the tractor needs to unload empty boxes in the empty equipment storage area, load parts in the waiting area or stacking area, and exchange empty and full pallet trucks in the Shunjian stocking area. During this period, the number of pallet trucks mounted on the tractor p is involved. The distance of a cycle operation path from the empty equipment storage area to the Shunjian stocking area is S = [S ₁ ,S ₂ ,…,S _m ], the unit time of mounting a pallet truck is T _GZ , and the calculation formula is as follows:

D4: Stock picking process,

The stock picking process involves the calculation of picking personnel. Since unpacking and picking are required, the equivalent logistics volume is the number of equipment carts, which mainly involves the path distance S _XK from the information point in the Shunjian field to the empty equipment area, the path distance S _KF from the empty equipment area to the sorting area, the path distance S _FD from the sorting area to the waiting area, and the sorting area distance S _FJ . The unit operation time involved is the unit time T _DY for printing the instruction ticket and the single sorting part time T _FJ . The walking speed of the personnel is v _r . After the parts are sorted, the equipment cart needs to be pushed to the waiting area. The calculation formula is as follows:

D5: Online stage,

In the on-line link, the operation process of the tractor can be regarded as transferring from each line of the Shunjian stocking area to the corresponding production line side storage area according to the type of parts. Therefore, the number of parts required to go online is calculated based on the number of equipment vehicles mounted on the tractor. The mounted equipment is generally picked and placed by the staff in the stocking area. Therefore, the mounted equipment trolleys are connected by default. The distance from the line side storage area to the Shunjian stocking area of each production line involved in the period is S = [S ₁ , S ₂ , ..., S _m ], the unit time for mounting equipment (mainly refers to unloading the pallet truck, pushing the pallet truck to the designated location, and mounting the empty pallet truck) is T _GZ , and the unit operation time for placing the equipment truck in the line side storage area is T _TQJ . The calculation formula is as follows:

By measuring the above links, the logistics resource accounting under the Shunjian logistics model based on equivalent logistics volume was completed, in which intermediate transfer variables were used as the basis for accounting, which is conducive to expanding to other logistics models and enhancing the theoretical explanatory power and accuracy of the logistics resource accounting results.

S5: Shunjian Logistics Resource Allocation Strategy is proposed.

Since the automobile production schedule will change over time, while the configuration of operators in each link of the site is fixed, this will lead to different workloads of operators, that is, the workload rate is not consistent (some operators have a higher workload rate, while others have a lower workload rate). By measuring the logistics resources in each link, the logistics resources required for each link under a certain workload rate can be accurately determined, which is helpful for proposing logistics resource allocation strategies. According to the analysis of Shunjian’s logistics resource accounting value and the actual number of employees, a personnel structural configuration optimization strategy can be formulated.

E1: Balanced workload,

When optimizing the structural configuration of logistics resources, the calculated values of logistics resources in each link can be used as a reference. When there is a certain gap between the calculated logistics resources in a certain link and the actual on-site operators, the personnel with low workload rate can be assigned additional tasks through planning and design. For example, due to different production schedules, the amount of parts to be operated is also different, and when the types of parts operated by operators are relatively fixed, this will cause some operators to have a larger workload, while some will have a smaller workload. For example, for forklift operators in the outbound transfer scene, the required workload of the parts can be analyzed based on the calculated values of different parts stacks, and the workload of these parts can be divided and redistributed to achieve the operation scheduling of forklifts and tractors according to the changes in the production schedule to ensure balanced workload.

E2: Process Reengineering and Allocation,

Since each operation process is interconnected, some of them have a sequence, such as unloading, acceptance and warehousing. This also causes some waiting time. The operation process can be analyzed based on the logistics resource accounting value and the actual number of operators for reference, and optimization can be carried out, and the diversity of operators' operations can be considered. For example, when waiting for parts unloading and acceptance, the work of some forklift drivers responsible for warehousing can be allocated to other operation links (without affecting the warehousing operation tasks), such as sorting and returning empty boxes, to reduce waiting time and reduce workload. This requires logistics planners to plan the operations of operators in detail and consider the workload of employees to achieve accurate task allocation.

E3: Optimization of personnel structure,

Based on the logistics resource accounting results of each link and the actual number of operators, the operators are reallocated to other links. This requires comprehensive training of employees to meet the needs of dynamic allocation of employees, so that they can be competent for the operating processes of other links and realize dynamic structural adjustments of operators in each link. At the same time, this requires planners to make accurate scheduling of personnel and allocation of work tasks and eliminate workers' discomfort with job transfers.

The above description is only a preferred example of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent substitution, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. A resource accounting method for a Shunjian logistics model based on equivalent logistics volume, characterized by the following steps: S1: Analysis of Shunjian logistics model operation process and logistics resources, In the Shunjian logistics model operation, five links are divided, namely, unloading and returning, acceptance and storage, outbound transfer, preparation and picking, and online. By disassembling the operation process of the five links, the flow of parts in the five links and the consumed logistics resources are determined. Among them, the operation areas of logistics resources consumed in each link are as follows: The unloading and empty return process involves three areas: the unloading port parking area, the acceptance area, and the empty container sorting area. The forklift at the unloading port parking area places the delivered parts in the acceptance area, and the forklift at the empty container sorting area returns the empty containers in the empty container sorting area to the parts manufacturer, and unloads the empty containers brought by the tractor from the Shunjian yard in the empty container sorting area; The acceptance and warehousing process involves the acceptance area, the loading port of the large three-dimensional warehouse, and the stacking area. The acceptance personnel need to inspect the parts sent by the manufacturer. After the acceptance is completed, the forklift will deliver the parts to a specific storage area, namely the loading port and stacking area of the large three-dimensional warehouse; the outbound transportation process involves the unloading port of the large three-dimensional warehouse, the stacking area, the temporary storage area to be shipped, the Shunjian stocking area, and the empty box sorting area. After receiving the parts, the forklift will take them off the shelf from the three-dimensional warehouse and transport them to the temporary storage area to be shipped. The parts in the stacking area are waiting for the tractor to transfer them and do not need to be transported to the temporary storage area to be shipped. After the forklift places the whole box of parts on the tractor's equipment car, the tractor will send them to the secondary storage area. In the Shunjian logistics model, the secondary storage area is the Shunjian yard. After the tractor delivers the parts to the secondary storage area, the tractor will transport the empty boxes to the empty box sorting area and carry out the next parts transportation; The stock picking process involves the information points, empty equipment storage area, picking area, and waiting area within the Shunjian yard, and is mainly carried out by picking personnel; The on-line process involves the waiting area and line-side storage area of the Shunjian yard. The tractor mounts the towed equipment vehicle in the waiting area of the Shunjian yard, transports the parts to the line-side storage area, and transports the empty equipment vehicle in the line-side storage area back to the Shunjian yard; S2: Data collection and compilation, Obtain automobile production plans and parts original unit information through data collection, and establish Shunjian parts information database; including the following steps: A1: Data collection, According to the logistics execution system and manufacturing operation management system of the automobile manufacturer, the automobile production plan and original unit information of the parts of the manufacturer are obtained. The automobile models and the production volume of each model are extracted from the automobile production plan, and the part number, the size of the part packaging box L: length, W: width, H: height, the number of parts accommodated U, the storage method, the supply method, and the part number and the number of equipment vehicles accommodated C are extracted from the manufacturing operation management system; the single vehicle usage q of various parts required, A2: Establish Shunjian parts information database, By collecting the original unit information of parts and the automobile production information, we can select the parts required for the production of each model of automobile according to the automobile model. Then, based on the supply method, we can select the parts required for the operation under the Shunjian logistics model, obtain the information of the required parts, and establish the Shunjian parts information database. S3: Construction of accounting model considering the differentiated impact of stocking units in Shunjian secondary storage, According to the activity-based costing method, by calculating the operation time T and the planned working time _Ts , the planning value of various logistics resources is obtained. Since workers cannot work at full capacity, the logistics resource accounting value is obtained by dividing it by the specified operation load rate λ, and the Shunjian logistics mode accounting model is obtained; The Shunjian logistics model accounting model is as follows: C1: Calculation of operation duration, When calculating the operation time T, it is regarded as the product of the operation time and the equivalent logistics volume. The operation time is regarded as the sum of the unit operation time and the parts transportation time _Ty . The parts transportation time is calculated by the operation distance and the operation speed. Among them, the operation distance is determined according to the operation area of each link under the Shunjian logistics model. The operation speed includes: forklift driving speed _vc , tractor driving speed _vq , personnel walking speed _vr , The unit operation time is calculated by the MTM time measurement method. By decomposing and summarizing the operation process of each link, the standard value of each unit operation time is determined. The unit operation time is divided into the following durations according to the operator: The unit time for code scanning operation T _sm involved in acceptance inspection refers to the unit time for code scanning inspection by the acceptance personnel; the unit time for appearance inspection T _cd refers to the unit time for the acceptance personnel to check whether the parts packaging box is intact; the unit time for arrival quantity confirmation T _dh refers to the unit time for the acceptance personnel to confirm the arrival quantity; The unit time of forklift operation T _C is the unit time required for the forklift to lift and put down the goods. The tractor time involves the unit operation time T _GZ of the equipment mounting when performing the operation, which refers to the unit operation time required for the tractor to untie and connect the new pallet truck when performing an empty and full equipment exchange; the unit operation time T _TQJ of the equipment delivery refers to the unit operation time required to deliver the equipment truck to the line-side storage area; The unit time T _DY for printing instruction tickets when picking personnel are working refers to the unit operation time for picking personnel to log in to the system to print instruction tickets; the unit operation time T _FJ for picking parts refers to the unit time required for picking personnel to pick a part from the parts packaging box and place it in the tool cart; C2: Calculation of equivalent logistics volume considering the differentiated impact of stocking units in Shunjian secondary storage, (1) Calculation of equivalent material flow rate stored once, Since one-time storage does not involve unpacking and picking operations, the parts transfer method is full box transfer. Therefore, when converting the equivalent logistics volume, the number of parts stacks is used as the equivalent logistics volume. The operation involves unloading and returning, acceptance and storage operations, and outbound transfer scenarios. When calculating the number of parts stacks, the vehicle type production ratio, parts single vehicle quota, parts packaging volume, and the number of equipment vehicles are used for calculation, and converted into standard stacks as the equivalent logistics volume, which is helpful for the subsequent calculation of the operation time required for parts operation, that is, the operation time of forklift and tractor logistics resources; Calculation of model production ratio: According to the production plan, calculate the model production ratio of each model c = [c ₁ , c ₂ , …, c _n ] ^T , where k _i is the number of each model scheduled for production in the production plan. The calculation formula for each model production ratio is: Calculation of parts quota per vehicle: based on the number of parts of each model used in different models, And the proportion of model production is used to calculate the average number of parts of each model used in the production of a car, that is, the parts per vehicle quota d = [d ₁ ,d ₂ ,…,d _m ] ^T : d＝qc Formula (3-4) Calculation of parts packaging volume: Based on the volumes of various parts packaging boxes and the number of parts contained, the approximate volume of a single part of each part is calculated, that is, V = [V ₁ , V ₂ , …, V _m ] ^T is the parts packaging volume, L = [l ₁ , l ₂ , …, l _m ] ^T , W = [w ₁ , w ₂ , …, w _m ] ^T , H = [h ₁ , h ₂ , …, h _m ] ^T , are the length, width and height of the parts packaging box, and U = [u ₁ , u ₂ , …, u _m ] ^T is the number of parts contained in the packaging box, that is, the number of parts contained, and the parts packaging volume is obtained. The calculation formula is as follows: V＝L⊙W⊙H/U Formula (3-5) Calculation of the number of parts stacks: Based on the parts per vehicle quota and the parts packaging volume, as well as the vehicle model production plan, the number of parts stacks required for transfer is calculated from D = [D ₁ , D ₂ , …, D _m ] ^T . A standard stack is assumed to be one cubic meter, where n _c represents the total number of vehicles produced. The calculation formula for the number of stacks for each part is as follows: D＝n _c d⊙V Formula (3-6) (2) Calculation of equivalent material flow rate of secondary storage, Calculation of the number of equipment vehicles: Shunjian logistics model requires that different parts be delivered to the production line side within the specified time through the stock picking process in the order of serial numbers. Therefore, in the stock sorting and on-line process, the parts need to be unpacked and picked, and different parts need to be distinguished and placed on special equipment vehicles. In these two links, the required number of equipment vehicles is used as the equivalent logistics volume. The calculation of the number of equipment vehicles Z = [Z ₁ , Z ₂ , ..., Z _m ] ^T requires the part single vehicle quota, the total number of automobile production and the number of equipment vehicles C = [C ₁ , C ₂ , ..., C _m ] ^T. The calculation formula is as follows: Z＝n _c d/C Formula (3-7) C3: Planned working time _Ts refers to the working time stipulated by the enterprise for workers. C4: Operation load rate refers to the fact that during the operation, employees cannot work at full capacity, so it is necessary to calculate the operation load rate to balance the employee's workload and give full play to their work capacity. When calculating logistics resources, the standard operation time and the range of operation load are specified for calculation. Let the operation load rate be λ; S4: Shunjian calculates logistics resources in all links, including the following five links: unloading and returning, acceptance and storage, outbound transfer, stock preparation and picking, and online launch; D1: Unloading and returning to empty space. In this link of logistics calculation, the required operation time is calculated through the path distance S _TY from the unloading parking area to the acceptance area and the path distance S _KT from the empty container area to the unloading parking space, the unit operation time _TC of the forklift and the driving speed v _{c of} the forklift. Then, the required number of workers and forklifts are calculated through the operation time. The operation logistics resources are forklift drivers and forklifts. The calculation formula is as follows: D2: Check and store the goods. When calculating logistics resources in the acceptance phase, it is necessary to calculate the unit time T _cd for appearance inspection, the unit time T _dh for confirmation of arrival quantity, and the unit time T _sm for code scanning. The number of acceptance personnel can be calculated based on the number of parts stacks to be accepted and the employee's workload rate. Due to the size of the packaging boxes, some parts are stored in the large stereoscopic warehouse, and the rest are stored in the stacking area. Therefore, when calculating the logistics resources in the warehousing link, the operating distance is the path distance S _YLK from the acceptance area to the stereoscopic warehouse and the path distance S _YDD from the acceptance area to the stacking area. Suppose there are k kinds of parts in the stereoscopic warehouse, h kinds of parts in the stacking area, k+h＝m, and the number of stacks of different parts is D _i and D _j . The operating logistics resources are forklift drivers and forklifts. The calculation formula is as follows: D3: Outbound transfer: The outbound link involves the problem of parts storage location. The outbound of parts in the stacking area is completed by the forklift that places the parts in the stacking area. Therefore, the logistics resources calculated in this link refer specifically to the forklift and forklift driver responsible for the outbound of parts in the large three-dimensional warehouse. The types of parts involved are the same as the types of parts stored in the three-dimensional warehouse in the inbound link, which is k. Suppose the path distance from the unloading port of the large three-dimensional warehouse to the temporary storage area to be shipped is S _XD , and the calculation formula is as follows: In the Shunjian logistics mode, the operation process of the tractor performing the outbound transfer scene is considered to be a round trip from the Shunjian yard to the empty equipment storage area. In the Shunjian stocking area, according to the type of parts, they are transferred to different storage areas of the Shunjian yard. During this period, the tractor needs to unload empty boxes in the empty equipment storage area, load parts in the waiting area or stacking area, and exchange empty and full pallet trucks in the Shunjian stocking area. During this period, the number of pallet trucks mounted on the tractor p is involved. The distance of a cycle operation path from the empty equipment storage area to the Shunjian stocking area is S = [S ₁ ,S ₂ ,…,S _m ], the unit time of mounting a pallet truck is T _GZ , and the calculation formula is as follows: D4: Stock picking process, The stock picking process involves the calculation of picking personnel. Since unpacking and picking are required, the equivalent logistics volume is the number of equipment carts Z, which mainly involves the path distance S _XK from the information point in the Shunjian field to the empty equipment area, the path distance S _KF from the empty equipment area to the sorting area, the path distance S _FD from the sorting area to the waiting area, and the internal distance S _FJ of the sorting area. The unit operation time involved is the unit time T _DY for printing the instruction ticket, the single sorting part time T _FJ , and the walking speed of the personnel v _r ; after the parts are sorted, the equipment cart needs to be pushed to the waiting area. The calculation formula is as follows: D5: Online stage, In the on-line link, the operation process of the tractor is regarded as transferring from each line of the Shunjian stocking area to the corresponding production line side storage area according to the type of parts. Therefore, the number of required parts on-line is calculated based on the number of equipment vehicles mounted on the tractor. The mounted equipment is generally picked and placed by the staff in the stocking area. Therefore, it is assumed that the mounted equipment vehicles are connected. During this period, the distance from the line side storage area of each production line to the Shunjian stocking area is S = [S ₁ ,S ₂ ,…,S _m ], the unit time for mounting equipment is T _GZ , and the unit operation time for placing equipment vehicles in the line side storage area is T _TQJ . The calculation formula is as follows: By measuring the above links, the logistics resource accounting under the Shunjian logistics model based on equivalent logistics volume was completed, in which the intermediate transfer variables were used as the basis for accounting, which is conducive to expanding to other logistics models and enhancing the theoretical explanation and accuracy of the logistics resource accounting results; S5: Shunjian Logistics Resource Allocation Strategy is proposed. Since the automobile production schedule will change over time, and the configuration of operators in each link of the site is fixed, this leads to different workloads of operators, that is, inconsistent workload rates. By calculating the logistics resources of each link, the logistics resources required by each link under a certain workload rate can be accurately determined to propose logistics resource allocation strategies. According to the analysis of Shunjian’s logistics resource accounting value and the actual number of employees, a personnel structural configuration optimization strategy can be formulated; E1: Balanced workload, When optimizing the structural configuration of logistics resources, the calculated values of logistics resources in each link are used as a reference. When there is a certain gap between the calculated logistics resources in a certain link and the actual on-site operators, the personnel with low workload rates are assigned additional tasks through planning and design. E2: Process Reengineering and Allocation, Since each operation process is linked to each other, some of them have a sequence. The three links of unloading, acceptance and warehousing have a sequence, which also causes some waiting time. Based on the logistics resource accounting value and the actual number of operators, the operation process can be analyzed and optimized, and the diversity of operators' operations can be considered; E3: Optimization of personnel structure, Based on the logistics resource accounting results of each link and the actual number of operators, the operators are reallocated to other links. This requires comprehensive training of employees to meet the needs of dynamic allocation of employees, so that they can be competent for the operating processes of other links and realize dynamic structural adjustments of operators in each link. At the same time, this requires planners to make accurate scheduling of personnel and allocation of work tasks and eliminate workers' discomfort with job transfers.