12+ About Use Case Diagram. Use case diagrams model the functionality of a system using actors and use cases. A use case diagram is a behavior diagram and visualizes the observable interactions between actors and the system under development.
Use case diagram is a pictorial representation of a user(s) actions in a system. They contain just the essential information that helps outline the following: Use case diagram allows you to model system functions, and present how actors interact with those functions.
Use case diagrams model the functionality of a system using actors and use cases.
12+ About Use Case Diagram. A use case diagram at its simplest is a representation of a user's interaction with the system that shows the relationship between the user and the different use cases in which the user is involved. Each use case diagram describes the scenario of execution of a definite task or reaching of any goal. The diagram consists of the system, the related use cases and actors and relates these to each other: A use case diagram is a dynamic or behavior diagram in uml.