Use Case Diagram

Use Case diagrams capture Use Cases and relationships between Actors and the subject (system).

Use To:

• Describe the functional requirements of the system
• Describe the manner in which outside things (Actors) interact at the system boundary
• Describe the response of the system.

Example Diagram:     Example Use Case Diagram

Tools:  Select Use Case diagram elements and connectors from the Use Case pages of the Toolbox. Click on the following elements and connectors for more information.

Notes:

• Invokes and Precedes relationships are defined by the Open Modeling Language (OML). They are stereotyped Dependency relationships; Invokes indicates that Use Case A, at some point, causes Use Case B to happen, whilst Precedes indicates that Use Case C must complete before Use Case D can begin.

Learn More:

• Use Case Extension Points
• Use Rectangle Notation
• Business Use Case
• Use Case pages