These diagrams also show how the system and its actors interact with one another. Use-case diagrams describe a system’s high-level functions and scope.
Circles or ellipses are used to depict the use cases. A use case is also often accompanied by other diagrams, as well. The use case diagram are usually referred to as behavior diagram used to describe the actions of all user in a system.Īll user shown in use case are actors and the functionality as action of system.
