18/05/2021
What is a use case diagram?
A UML use case diagram is the primary form of system/software requirements for a new software program underdeveloped.
Specify the expected behavior (what), and not the exact method of making it happen (how).
It only summarizes some of the relationships between use cases, actors, and systems.
It does not show the order in which steps are performed to achieve the goals of each use case.