JPH02311250A - Production planning formation device - Google Patents

Abstract

PURPOSE:To form a production plan at a high speed by providing a means setting a constraint on production for each process, a means comparing constraints, a means deleting or appending a process plan, and a means correcting the constraint. CONSTITUTION:By a production planning instruction device 1, a constraint on production is instructed and constructed on a constraint expression device 4, and based on the constraint, searching is executed by a production planning searching device 2. When the production plan expressed by a production planning expression device 3 and that indicated by the device 1 competes with each other, priority between processes is compared by a production planning comparison device 5. When the priority of the product on the device 3 is lower, the production plan is deleted by a production planning deleting device 6, recorded on the device 4, and the production plan instructed by the device 1 is appended to the production plan on the device 3 by a production planning appending device 7. When the priority is higher, the constraint on the production instructed by the device 1 is corrected by a constraint automatic accumulation device 8 or by the device 1, and a production plan is kept on being formed by the device 2 until the constraint instructed by the device 1 is satisfied.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a production planning device that supports the creation of a production plan for an asynchronous parallel production system, and particularly to a production planning device that supports the creation of a production plan during or after creation of a production plan. It relates to things that can speed up production planning.

[Conventional technology]

In general, production planning devices are used to create and change plans.

When changing a product plan during addition, it is necessary to change all process plans for the changed product, and it takes a lot of time to create, change, and add plans.

1 References 1 Tsukiyama, Mori, Fukuda, “A method of production scheduling,”
Proceedings of the 1st Discrete Event System Study Group, Society of Instrument and Control Engineers, 33/38, 198B, 9 [Problem to be solved by the invention] Conventional equipment is configured as described above, and it is difficult to create and change production plans. , which required a lot of additional time.

This invention was made in order to solve the problems of the conventional ones as mentioned above.

It is an object of the present invention to provide a production plan creation device that can automatically create a production plan at high speed while making changes and additions while satisfying various constraint conditions.

[Means to solve the problem]

The production planning device according to the present invention includes means for setting production constraints in each process of each product, means for comparing constraints between processes, and a process plan for any process of any product from an existing plan. This system includes means for deleting, means for adding a processing plan for any process of any product to an existing plan, and means for modifying constraints for any process for any product.

[Effect]

In the present invention, by configuring as described above, it is possible to create a production plan at high speed by deleting and adding only necessary plans when deleting and adding plans.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of a production planning device according to an embodiment of the present invention.

The production planning device according to this embodiment has constraints on production planning (
For example, delivery date, processing start time, processing conditions.

a device 1 for instructing (targets in production, etc.); a device W2 for searching idle time of devices in a production plan; a device 3 for expressing and storing the production plan; and a device 4 for expressing constraints in production instructed by the device 1. , a device 5 for comparing priorities between each process of each product, a device 6 for deleting a production plan for any product from an existing production plan, and a device 6 for adding a production plan for any product to an existing production plan. The device 7 includes a device 7 and a device W8 that automatically corrects constraints in any process of any product.

The production plan instruction device 1 instructs constraints in production, constructs them on the constraint expression device 4, and determines whether the production plan can be added to the production plan expressed in the production plan expression device 3 based on the constraints. Search is performed using the production plan search device 2. If a conflict occurs between the production plan expressed in the production plan expression device 3 and the production plan instructed by the production plan instruction device 1, the production plan is compared with the priorities among the processes of each product. This is done by the comparator 5.

Then, when the product on the production plan expression device has a lower priority, the production plan of the product on the production plan expression device 3 is deleted by the production plan deletion device 6, and the deleted production plan is recorded in the constraint expression device 4. Then, the production plan instructed by the production plan creation device engineer is added to the production plan on the production plan expression device 3 by the production plan addition device 7. However,
If the production plan for the product on the production plan expression device 3 has a higher priority, the production constraints specified by the device I are applied by the automatic constraint accumulation device 8 or the production plan instruction bag W1.
Then, the production plan searching device 2 again creates a production plan until the production constraints specified by the production plan instructing device 1 are satisfied.

Moreover, FIG. 2 is a flowchart diagram showing the operation of the apparatus of this embodiment.

Next, the operation of the above embodiment will be explained with reference to FIGS. 1 and 2.

When the system is started, first, a process 1 is performed to instruct constraints in the production plan using the production plan instruction bag W1, and then a process 2 is performed to set constraints regarding the process of the product to be added. Then, a process 3 is performed to check for conflicts (contradictions) between the constraints set in process 2 and the plan on the production plan expression device 3.

Here, if there is no conflict, the production plan addition device 7 performs process 7 of adding a process plan based on the constraints set in process 2, but if a conflict occurs in the constraints, the device 1 Process 4 is performed to compare the priorities (strength of constraints) between the process constraints set in Equipment R3 and the process constraints of the production plan set in Equipment R3, and the process constraints set in Equipment R3 are prioritized. When the ranking is higher, the process constraints are corrected manually by the device 1 or automatically by the automatic constraint correction device 8, and process 2 of resetting the process constraints is performed. If the priority of the process constraints set in the device 3 is lower, the production plan deletion device 6 performs a process 5 for deleting that process, and a process 6 for recording the deleted process in the constraint expression device 4. Then, based on the constraints set in the constraint expression bag W4, the production plan addition device 7 performs processing 7 for adding a process plan.Then, all the process processes based on the constraints set in the device 4 are planned. Process 8 is performed to check whether the processes deleted in Process 5 have been planned. Process to check 10
If there is a process that has not been planned, a process 11 for setting the deleted process is performed and the process moves to process 2, but if all have been planned, this series of processes ends there.

In this way, according to the present embodiment, product processes are planned in order of priority, so the possibility of unnecessary deletion of plans is reduced. In other words, this device allows for faster production planning compared to existing devices. Furthermore, the plan created by this device satisfies the important production conditions, making it a semi-optimal plan.

〔Effect of the invention〕

As described above, according to the production planning device according to the present invention, the production plan can be created quickly because the product process is planned in the order of priority after satisfying the production constraints. This has the effect of allowing you to do this.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a block configuration of a production planning device according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the device in FIG. 1. In the figure, 1 is a production plan instruction device, 2 is a production plan search device, 3 is a production plan expression device, 4 is a constraint expression device, 5 is a production plan comparison device, 6 is a production plan deletion device, and 7 is a production plan addition device. , 8 is a constraint automatic correction device.

Claims (1)

[Claims] (1) A means for setting constraints in production for each process of each product, a means for comparing constraints between processes, a means for deleting a processing plan for any process for any product from an existing plan, and A production planning device comprising: means for adding a processing plan for any process of any product to a plan; and means for modifying constraints of any process for any product.