What is a Use Case?
A use case is a document that describes the user action and system response for a particular functionality. (you can also include, For example, in the Use Case given below, is a Use Case for login system for a company called Auto Parts One. This application is being developed by Digital Systems, Inc. The project name is Auto Parts One. However, the business owner (user) is a company called American Auto Parts of the North (imaginary name).
Click here to see the Use_Case_Sample.