What is a use case?

 A use case is a methodology used in system analysis to identify, clarify, and organize system requirements. The method creates a document that describes all the steps taken by a user to complete an activity.
Every use case contains three essential elements:
  • The actor. The system user -- this can be a single person or a group of people interacting with the process.
  • The goal. The final successful outcome that completes the process.
  • The system. The process and steps taken to reach the end goal, including the necessary functional requirements and their anticipated behaviors.



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