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Basic steps for drawing UML use case diagrams

Description

The detailed steps for creating any modeling diagram are described in how to: edit UML models and diagrams.

Create a new UML use case diagram

1. On the Architecture menu, click New Diagram.

two。 Under templates, click UML use case Diagram.

3. Name the diagram.

4. In add to Modeling Project, select an existing modeling project from your solution, or select create a new modeling project, and then click OK

Draw UML use case diagram

1. Drag the subsystem boundary from the toolbox to the diagram, which can represent the entire system or its major components.

If ◆ does not want to describe which use cases the system or its components support, the system boundaries may not be drawn in the use case diagram.

◆, drag the four corners of the system to enlarge it as needed.

◆ renamed it appropriately.

two。 Drag the participant from the toolbox to the diagram (outside all system boundaries).

◆ participants represent the various users, organizations, and external systems that interact with your system.

◆ renames these participants. For example: "customers", "restaurants", "credit card institutions".

3. Drag the use case from the toolbox to the appropriate system.

The ◆ use case represents the activities performed by the actor with the help of the system.

◆ renames these use cases with names that the actors themselves can understand. Do not use code-related names. For example: "order meal", "pay meal fee", "deliver food".

◆ starts with the main transaction (such as "ordering") and ends with later smaller transactions (such as "ordering").

◆ puts each use case into the system or major subsystem that supports it (ignoring any appearance pattern or component pattern that is only relevant to the user).

◆ can draw a use case outside the boundaries of the system to indicate that the use case is not supported by the system (perhaps in a particular version).

4. Click Associate on the toolbox, then click the use case, and then click the actor of the use case. In this way, each participant is linked to its use case.

5. Use "include", "extend", and "generalize" relational structured use cases. To create each of these links, click the tool, the source use case, and the target. See the structured use cases section below.

6. Describe the use case in detail. See the section below that describes the use cases in detail.

7. Draw other diagrams for different subsystems or different groups of related use cases. All diagrams in a modeling project are multiple views of the same model.

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