Assistance tool

A design assistance tool device assisting a design of at least one process, the design assistance tool device comprising

• a computer-readable non-transitory storage medium;
• and
• a microcomputer, by executing a program stored in the computer-readable non-transitory storage:
• defines a metamodel using at least one metaclass and perform a design of the at least one process using the metamodel;
• stores a content of the design in a database as a design content;
• displays the design content as a view on a display;
• and
• performs creation, modification, or deletion of at least one of the metamodel or a design result based on the metamodel using the view on the display,
• wherein
• the view on the display includes multiple view types described in different formats,
• when the creation, modification, or deletion of at least one of the metamodel or the design result based on the metamodel is made using one of the multiple view types, corresponding design information is stored in the database,
• based on the design information stored in the database, the creation, modification, or deletion is reflected in another one of the multiple view types described in different formats,
• the metamodel, the design result based on the metamodel, and the design information are stored in the database as a data structure in which the metamodel, the design result based on the metamodel, and the design information are linked to one another,
• the design assistance tool device is configured to design a vehicle system, the design of the vehicle system includes a system development process and a software development process,
• the system development process includes, as the at least one process:
• a requirement definition process that sets a development goal;
• a logical design process that defines a function, an input, and an output;
• a control design process that defines a calculation formula to be used for each control as a circuit design;
• and
• a physical design process that physically assigns a control to a vehicle electronic control unit (ECU);
• and
• the software development process includes, as the at least one process:
• a specification definition process that defines specification of a software that concretely includes an outline defined in the system development;
• a basic design process that divides functions defined in the system development into multiple layers and defines, for each function, an input to be obtained and an output to be output;
• and
• a detail design process that defines a specific calculation method in a flowchart and describes the calculation method with a programming language;
• in the system development process, each of the requirement definition process, the logical design process, the control design process, and the physical design process is performed using the corresponding metamodel;
• in the software development process, each of the specification definition process, the basic design process, and the detail design process is performed using the corresponding metamodel;
• in one of the multiple view types, when the creation, modification, or deletion is made in one metamodel, which corresponds to one process included in the system development process or the software development process, the creation, modification, or deletion made in one metamodel is reflected in another one of the multiple view types, which is described in different format and corresponds to another metamodel of another process included in the system development process or the software development process;
• in one of the multiple view types, when the creation, modification, or deletion is made in the design result of one metamodel, which corresponds to one process included in the system development process or the software development process, the creation, modification, or deletion made in the design result of one metamodel is reflected in another one of the multiple view types, which is described in different format and corresponds to another metamodel of another process included in the system development process or the software development process;
• and
• execute the system development process and the software development process using the ECU in a repeated manner when the design content is expressed from another viewpoint, a definition of logical formula, an arrangement design for physically arranging the design content in both of the system development and the software development.