Use Case Diagrams

A use case diagram is a graphical view of some or all of the actors, use cases, and their interactions identified for a system. Each system typically has a Main Use Case diagram, which is a picture of the system boundary (actors) and the major functionality provided by the system (use cases). Other use case diagrams may be created as needed. Some examples follow:

  • A diagram showing all the use cases for a selected actor

  • A diagram showing all the use cases being implemented in an iteration

  • A diagram showing a use case and all its relationships

CREATING THE MAIN USE CASE DIAGRAM IN RATIONAL ROSE

1.
Double-click on the Main diagram ...

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