JP6088445B2 - Software scale arithmetic device and program - Google Patents

Description

  The present invention relates to a technique for calculating the function scale of software from source code.

  When calculating the software scale, the FP (Function Point) method is used. The FP method is a method of extracting software functions based on the user's required specifications, assigning function points for each function, and setting the total value of the points as the function scale of the software.

  Various methods are disclosed as the FP method, and one of them is COSMIC (The Common, which calculates the function scale of software using the number of inputs and outputs (number of data movements) of all functions to be developed. Software Measurement International Consortium) (Non-Patent Document 1). In the COSMIC method, (1) the measurement items are only the number of data movements, so that the measurement is simple. (2) There are concepts such as the software layer and the functional division of software. There is a feature in point.

  The COSMIC method is an international standard (ISO (International Organization for Standardization) / IEC (International Electrotechnical Commission) 19761: 2003).

Standard No. JIS X0143, “Software Technology – COSMIC Functional Scale Measurement Method”, [online], Japan Industrial Standards Committee, [December 26, 2013 search], Internet <URL: http: //www.jisc.go .jp / app / JPS / JPSO0020.html [X0143]>

  However, although the COSMIC method is standardized, there are not a few parts whose specifications are defined only qualitatively. In addition, various rules are provided in places where the specification of the COSMIC method is quantitatively defined. For this reason, when using the COSMIC method, it is necessary to read the specifications and gain a long experience. That is, even if a beginner tries to use the COSMIC method, it takes a lot of time and there is a problem that if the person is not skilled, there is an individual difference in the number of function points. This problem is not limited to the case where the function scale is calculated based on the user's required specifications, but is the same when the function scale of software is calculated from the source code.

  Therefore, an object of the present invention is to provide a technique for calculating the functional scale of software with reproducibility while applying labor and individual differences by applying the COSMIC method to source code.

The software scale arithmetic device of the present invention analyzes a source code, extracts a parameter relating to data movement as a measurement item, and executes a scanner process for counting the number of times the parameter is used, and the scanner unit by the counted number of uses of the parameter, and a evaluation unit number of the function points for use count of the parameter is applied to the evaluation formula is given as a weight, to calculate the number of functional size, further , Referring to framework definition information stored in association with the code extracted as the measurement item in the source code and the parameter, generating an application program for the scanner processing, and generating the generated application program Scanner generation to be set in the scanner section And an evaluation model generation unit that refers to evaluation model definition information storing a score to be given to the number of times of use of the parameter, generates the evaluation formula, and sets the generated evaluation formula in the evaluation unit, equipped and wherein the Rukoto.

According to such a configuration, the software scale calculation device can analyze the source code to obtain the number of times of use of the parameter related to data movement, and can calculate the function scale score using the number of times of use. Therefore, the software scale arithmetic device can calculate the functional scale of software with reproducibility while applying labor and individual differences by applying the COSMIC method to the source code.
In addition, the software scale arithmetic device can automatically generate a scanner unit that counts the number of parameter usages by referring to the framework definition information and the evaluation model definition information, and can generate an evaluation formula. It is possible to calculate the functional scale of software with reproducibility while suppressing.

  The invention relating to the program has the same technical features as the software scale arithmetic device described above, and has the same operational effects as the software scale arithmetic device, so the description thereof is omitted.

  According to the present invention, the function scale of reproducible software can be calculated using the COSMIC method while suppressing labor and individual differences.

It is a figure which shows the example of a function of a software scale calculation system. It is a figure which shows an example of the evaluation model for dividing a functional process. It is a figure which shows the structural example of the system of the evaluation object of a functional scale. It is a figure which shows an example of the evaluation model definition file about the system of evaluation object. It is a figure which shows an example of the framework definition file about the system of evaluation object. It is a figure which shows an example in the case of determining whether it is an update system method or a reference system method.

  A mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings as appropriate.

An example of the function of the software scale calculation system 100 of this embodiment will be described with reference to FIG.
The software scale calculation system 100 includes a software scale calculation device 10 and a storage device 20. The software scale calculation system 100 has a function of receiving an input of the source code 40, calculating a function point score in the software scale calculation device 10, and outputting a function scale score S (41).

  The software scale calculation device 10 includes a scanner unit 11, an evaluation unit 12, a scanner generation unit 13, and an evaluation model generation unit 14. The software scale arithmetic device 10 has a CPU (Central Processing Unit) and a main memory (not shown), and develops an application program stored in a storage unit (not shown) in the main memory, so that each unit (11-14) It embodies the function.

The scanner unit 11 has a function of analyzing a lexical phrase of the input source code 40, extracting a parameter relating to data movement as a measurement item, and executing a scanner process for counting the number of times the parameter is used.
The evaluation unit 12 calculates the evaluation formula generated by the evaluation model generation unit 14 using the number of times the parameter is counted by the scanner unit 11, and outputs the calculation result as a function scale score S (41). It has a function. Note that the evaluation formula accumulates the number of function points with respect to the number of times the parameter is used, and accumulates the accumulated value for all parameters.

The scanner generation unit 13 has a function of referring to a framework definition file (framework definition information) 21 in the storage device 20 and setting an application program for the scanner processing in the scanner unit 11.
The evaluation model generation unit 14 has a function of referring to an evaluation model definition file (evaluation model definition information) 22 in the storage device 20, generating an evaluation formula having parameters as variables, and setting the evaluation formula in the evaluation unit 12. .

  The storage device 20 is a hard disk or the like, and stores a framework definition file 21 and an evaluation model definition file 22. The framework definition file 21 and the evaluation model definition file 22 are created by operating the terminal 30 by an operator who estimates the functional scale of the software.

The framework definition file 21 describes the relationship between codes and parameters extracted as measurement items in order for the scanner generation unit 13 to analyze the lexical of the source code 40.
The evaluation model definition file 22 describes the points to be given to the number of times the parameter is used in order to generate an evaluation formula in the evaluation model generation unit 14.

  The terminal 30 is a device used by an operator for operating the software scale calculation system 100. Further, the operator can create the framework definition file 21 and the evaluation model definition file 22 by using the terminal 30 and using a GUI (Graphical User Interface) (not shown) provided in the software scale arithmetic apparatus 10. .

  Next, details of the framework definition file 21 and the evaluation model definition file 22 and specific examples of evaluation formulas used in the evaluation unit 12 will be described.

  First, in order to measure the number of data movements, it is necessary to divide the source code 40 into several functional processes so that the exchange of data between the functional processes can be measured. In the present embodiment, the source code 40 is created with one of the frameworks, Spring Framework (registered trademark) (hereinafter simply referred to as Spring) and JSP (JavaServer Pages) (registered trademark). Will be described.

  Here, the framework is software that collectively provides general-purpose functional processes that are frequently required when developing an application.

  FIG. 2 shows an example of an evaluation model for dividing functional processes. The user 50 defined by the COSMIC method is not necessarily a person, and is a framework in this embodiment. Each functional process is divided into a functional process (View) 51, a functional process (Controller) 52, a functional process (Service) 53, and a functional process (Repository) 54 for each function.

The functional process (View) 51 has a function of displaying input / output messages and the like.
The functional process (Controller) 52 has a function of determining processing for executing the called request when called from the framework.
The functional process (Service) 53 has a function of executing processing determined by the functional process (Controller) 52.
The functional process (Repository) 54 has a function of accessing data (table) stored in the persistent storage area 55. Specifically, the function is read / write.
The persistent storage area 55 has one or more tables and stores data in the tables. Persistent means that a functional process can store data beyond its lifetime.

  The number of pieces of movement data includes the boundary 56a between the user 50 and the functional process 51 and between the user 50 and the functional process 52, the boundary 56b between the functional process 52 and the functional process 53, and the functional process 53. With respect to data passing through the boundary 56c between the function process 54 and the function process 54, the number of “entries” that are incoming data and the number of “exits” that are outgoing data are counted. In addition, the number of data reads / writes is counted between the functional process 54 and the persistent storage area 55.

Next, a configuration example of the operation support system 330 as a function scale evaluation target system will be described with reference to FIG.
The operation support system 330 shown in FIG. 3 includes three operation systems (300a, 300b, 300c). Each of the operation systems (300a, 30b, 300c) is connected so as to be communicable in a mesh form via a linkage unit (IF: interface) 324, 325. Note that the number of operation systems provided in the operation support system 330 is not limited to three.

Since the functions of the three operation systems (300a, 300b, 300c) are all the same, the operation system 300a will be described as a representative here.
The operation system 300a includes a View 311, a Controller 312, a Service 313, a Repository 320, a DB (DataBase) 321, an NE (Network Element) access unit 322, and cooperation units 324 and 325.

The functions of the View 311, the Controller 312, the Service 313, and the Repository 320 correspond to the functional process (View) 51, the functional process (Controller) 52, the functional process (Service) 53, and the functional process (Repository) 54 shown in FIG. In charge of processing related to operations.
The DB 321 corresponds to the persistent storage area 55 shown in FIG. 2 and stores data used for operations.

The NE access unit 322 has a function of transmitting instruction information from the Service 313 to the NE 323 and receiving predetermined information from the NE 323. The NE 323 is a device for providing a telecommunication service. For example, an exchange, a transmission device, a wireless device, etc. In FIG. 3, only one NE 323 is shown for each operation system, but two or more NEs 323 may be used. The NE 323 may be communicable from the NE access unit 322 of a plurality of operation systems.
The linkage units 324 and 325 are interfaces for exchanging information on data used for operations between the operation systems (300a, 300b, and 300c).

Next, an example of the evaluation model definition file 22 when the operation support system 300 shown in FIG. 3 is an evaluation target will be described with reference to FIG.
The evaluation model definition file 22 stores information representing the number of points assigned to the number of times the parameter is used.

Specifically, as shown in FIG. 4, parameters, parameter descriptions, points, and remarks are associated with each other.
The parameter corresponds to a variable of the evaluation formula.
The description of the parameter is described so that the operator can understand what the parameter represents.
The score is the number of data movements when the parameter is used once, that is, the number of function points.
In the remarks, “automatic acquisition” is described in the case of a parameter that can be automatically acquired by the scanner unit 11, and a blank indicates that the parameter is input by an operator.

Here, the contents of the evaluation model definition file 22 will be described below.
The parameter “A” indicates the number of information to be displayed at the time of execution, is automatically acquired, and has a score of “2”.
The parameter “B” indicates the number of screens, is automatically acquired, and has a score of “2”.

The parameter “C _r ” indicates the number of parts on the screen (when there is a return value), is automatically acquired, and has a score of “6”.
The parameter “C _w ” indicates the number of parts on the screen (when there is no return value), is automatically acquired, and has a score of “5”.

The parameter “(D _r ) _i ” indicates the number of accesses from the application to the table (i) (in the case of reference), is automatically acquired, and has a score of “2”.
The parameter “(D _w ) _i ” indicates the number of accesses from the application to the table (i) (in the case of updating), is automatically acquired, and has a score “1”.
Here, the application is the Service 313 shown in FIG.

The parameter “(E _r ) _i ” indicates the number of accesses from the application to NE (i) (in the case of reference), is input from the terminal 30, and has a score of “2”.
The parameter “(E _w ) _i ” indicates the number of accesses from the application to NE (i) (in the case of updating), is input from the terminal 30, and has a score of “1”.
Here, the application is the Service 313 shown in FIG.

The parameter “F _r ” indicates the number of accesses from the application to the cooperation units 324 and 325 (in the case of reference), and is input from the terminal 30 and has a score of “2”.
The parameter “F _w ” indicates the number of accesses from the application to the linkage units 324 and 325 (in the case of updating), and is input from the terminal 30 and has a score of “1”.
Here, the application is the Service 313 shown in FIG.

The parameter “N” indicates the number of all tables and is automatically acquired. Specifically, it is the number of tables stored in the DB 321 shown in FIG.
The parameter “M” indicates the number of all NEs 323 and is input from the terminal 30.

The parameter “(d _r ) _i ” indicates the multiplicity (in the case of reference) of the Repository 320 with respect to the table (i), is automatically acquired, and has a score of “3”.
The parameter “(d _w ) _i ” indicates the multiplicity (in the case of updating) of the Repository 320 with respect to the table (i), is automatically acquired, and has a score of “2”.
Here, the multiplicity is the number of the Repository 320 having the same name in the Repository 320 accessing the table (i).

The parameter “(e _r ) _i ” indicates the multiplicity of the NE access unit 322 with respect to NE (i) (in the case of reference), is input from the terminal 30, and has a score of “4”.
The parameter “(e _w ) _i ” indicates the multiplicity (in the case of updating) of the NE access unit 322 with respect to NE (i), and is input from the terminal 30 and has a score of “2”.
Here, the multiplicity is the number of the same NE access units 322 among the NE access units 322 accessing NE (i).

The parameter “f _r ” indicates the number of reference units in the reference system, is input from the terminal 30, and has a score of “4”.
The parameter “f _w ” indicates the number of update cooperation units and is input from the terminal 30 and has a score of “2”.

  Next, an example of an evaluation formula for the function scale generated by the evaluation model generation unit 14 and set in the evaluation unit 12 is shown in the following formula (1).

As shown in Equation (1), the function scale of the software is represented by a score S. Note that the final term “3” in the equation (1) is the score of the initial process of the controller 312.
In Expression (1), the first to fourth terms are scores that depend on the screen display, and it is understood that the scores are independent of the number of tables, the number of NEs, and the number of linkage units. Since the fifth and subsequent terms (excluding the final term) depend on the number of tables, the number of NEs, and the number of linkage units, the number of tables can be reduced by sharing tables, or the number of NEs can be changed. By doing so, the change in the functional scale can be quantified by comparing the scores S before and after the change.

Next, an example of the framework definition file 21 will be described with reference to FIG. 5 (see FIGS. 3 and 4 as appropriate).
The framework definition file 21 represents the relationship between parameters and measurement items that are codes extracted from the source code 40.
The parameters are the same as those shown in FIG.
The measurement item represents a code to be extracted from the source code 40.
The remarks explain the determination conditions and the like when counting the numbers.

The measurement item of the parameter “A” is the number of <c: out> tags.
The measurement item of the parameter “B” is the number of JSP files.

The measurement item of the parameter “C _r ” is the number of reference system methods of the Controller class.
The measurement item of the parameter “C _w ” is the number of update methods of the Controller class.
Here, the sorting of the parameter “C _r ” and the parameter “C _w ” will be described. As shown in the remarks, when a method of an update system related to a method argument (when the corresponding method has no return value) is executed at least once, it is determined as a reference system. Otherwise, it is determined as an update system.

Here, a determination example of the update system and the reference system will be described using a specific example shown in FIG.
In FIG. 6, in the second line “arg1.method ();” of the source code, an update method related to the method argument arg1 is executed.
Next, in the third line “a = arg1.method ();”, a reference method related to the method argument arg1 is executed.
In the fourth line “arg1.method ();”, an update method related to the method argument arg1 is executed. However, the second and subsequent times are not counted.
Then, in the fifth line “return a;”, the value a is the return value.

  Therefore, method 1 shown in FIG. 6 is determined as a reference system because the update method is executed one or more times.

Returning to FIG. 5, the measurement item of the parameter “D _r ” is the number of reference system Repository class calls in the method in the Service class.
The measurement item of the parameter “D _w ” is the number of update-type Repository class calls in the method in the Service class.
Here, as shown in the remarks, if there are multiple calls to the same Repository class in one method, it is counted as one. For each Repository class call, if there is a return value, it is determined as a reference system, and if there is no return value, it is determined as an update system. For each Repository class call, count how many Repository class calls have the same name.

  The measurement item of the parameter “N” is the number of Repository classes. However, as shown in the remarks, duplication is not included.

The measurement item of the parameter “d _r , d _w ” is the number of the same name Repository for all the Repository.

  Then, the scanner generation unit 13 refers to the measurement items in the framework definition file 21 and sets an application program for scanner processing in the scanner unit 11.

As described above, the software scale arithmetic apparatus 10 according to the present embodiment analyzes the source code, extracts the parameter relating to the data movement as the measurement item, and executes the scanner process 11 that performs the scanner process for counting the number of times the parameter is used. And applying the number of times of use of the parameter counted by the scanner unit 11 to an evaluation formula in which the number of function points is given as a weight to the number of times of use of the parameter, and calculating the score S of the function scale Part 12. Further, the software scale arithmetic device 10 refers to the framework definition file 21, generates an application program for the scanner processing, and refers to the scanner generation unit 13 that is set in the scanner unit 11 and the evaluation model definition file 22. And an evaluation model generation unit 14 that generates the evaluation formula and sets the evaluation formula in the evaluation unit 12.
Therefore, the software scale calculation device 10 can calculate the function scale of software with reproducibility while applying labor and individual differences by applying the COSMIC method to the source code.

  Further, the software scale arithmetic device 10 quantitatively evaluates the change in the function scale by the score S when the source code 40 is updated with changes in the number of tables, the number of NEs, and the number of linkage units. be able to.

  In the present embodiment, the source code 40 has been described as being created by Spring Framework and JSP. However, the present invention is not limited to the source code 40 created by such a program. In the present embodiment, the system to be evaluated has been described as the operation support system 330 (see FIG. 3). However, the system is not limited to the operation support system 330.

DESCRIPTION OF SYMBOLS 10 Software scale arithmetic device 11 Scanner part 12 Evaluation part 13 Scanner production | generation part 14 Evaluation model production | generation part 21 Framework definition file (framework definition information)
22 Evaluation model definition file (evaluation model definition information)
30 terminal 40 source code 41 function scale S
50 users (framework)
51, 52, 53, 54 Functional process 55 Persistent storage area 100 Software scale calculation system 300a, 300b, 300c Operation system 311 View
312 Controller
313 Service
320 Repository
321 DB
322 NE access unit 323 NE
324,325 Cooperation Department (IF)
330 Operation Support System

Claims (2)

Analyzing the source code, extracting a parameter relating to data movement as a measurement item, and executing a scanner process for counting the number of times the parameter is used,
The use count of the parameter is counted by the scanner unit, the number of function points for use count of the parameter is applied to the evaluation formula is given as a weight, and evaluation section for calculating the number of functional size, the Prepared ,
further,
Reference is made to framework definition information stored in association with the code extracted as the measurement item in the source code and the parameter, and an application program for the scanner processing is generated, and the generated application program is A scanner generation unit to be set in the scanner unit;
An evaluation model generation unit that refers to evaluation model definition information storing a score to be given to the number of times of use of the parameter, generates the evaluation formula, and sets the generated evaluation formula in the evaluation unit;
Software scale arithmetic unit according to claim Rukoto equipped with. On the computer,
A first procedure for analyzing a source code, extracting a parameter relating to data movement as a measurement item, and executing a scanner process for counting the number of times the parameter is used;
Applying the number of times of use of the parameter counted in the first procedure to an evaluation formula in which the number of points of the function point is given as a weight with respect to the number of times of use of the parameter; procedure, to the execution,
further,
Generating an application program for scanner processing of the first procedure by referring to framework definition information stored in association with the code extracted as the measurement item in the source code and the parameter; A third procedure for setting the scanner process to be executed based on the application program
The evaluation model definition information storing the score to be given to the number of times of use of the parameter is referred to, the evaluation formula is generated, and the generated evaluation formula is set as the evaluation formula of the second procedure. procedure,
Because of the program to the execution.

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