Use Case Diagram

A Use Case diagram captures Use Cases and relationships between Actors and the subject (system). It describes the functional requirements of the system, the manner in which outside things (Actors) interact at the system boundary, and the response of the system.

In developing a Use Case diagram, also consider:

• Use Case Extension Points

• Use Rectangle Notation
• Business Use Case (stereotyped Use Case)

Example Diagram

The following diagram illustrates some features of Use Case diagrams:

Toolbox Elements and Connectors

Select Use Case diagram elements and connectors from the Use Case pages of the Enterprise Architect UML Toolbox.