12+ Explain Use Case Diagram. In addition to introducing use cases as primary elements in software development, jacobson (1994) also introduced a diagram for visualizing use cases. Uml use case diagrams are ideal for:
The use case diagram is also now part of the uml. Use case diagrams are used to gather the requirements of a system including internal and external influences. It models how an external entity interacts with the system to make it work.
Many people find this kind of diagram useful.
12+ Explain Use Case Diagram. Use case diagrams visualize use cases, actors and relationships. A uc specification complements use case diagrams and describe individual cases of use. These diagrams are meant to summarize interactions, not explain them. Use case diagrams specify how the system interacts with actors without worrying about the details of how that functionality is implemented.