Use Case Diagram Explanation Pdf. Sequence diagram from a use case 6 1. Use case diagrams class diagrams object diagrams sequence diagrams collaboration diagrams statechart diagrams activity diagrams component diagrams deployment diagrams.
The use case diagram palette each icon on this palette represents a notation used to create a use case diagram. An actor is an entity that initiates the use case from outside the scope of a use case. They are also great storyboard tools for user meetings.
The user presses the check email button.
Use case diagrams are used to identify the primary elements and processes that form the system. A use case instance use case a collection of related success and failure scenarios describing actors using the system to. But use case diagram never describes how they are implemented. After receiving an acknowledgement the client asks the server if there is any new email.
