13+ Arrows In Use Case Diagram. The actor does not necessarily need to be a human user. Or simply, why use cases?.
Use case diagrams are valuable for visualizing the functional requirements of a system that will translate into design choices and development priorities. These external entities are referred to as actors. Broken arrows are used to indicate dummy activities.
Suppose you wanted to add detail to the diagram shown below, representing an airline reservation system.
13+ Arrows In Use Case Diagram. Use cases show what your system should do. An actor is usually drawn as a named stick figure. The final element in use case diagrams are relationships, which show how actors and use cases interact with each other. This role can also be assigned to an external system which accesses another system.