5.9. User Scenarios and Use-Case Diagrams
A user scenario is a step-by-step description of a discrete user interaction with your system. It is a sequence written out as a simple paragraph. You can have different scenarios of varying degrees of generality to cover everything in your system. For instance, our WWWBooks online store example would probably have a user scenario for Check Out. The Check Out scenario would look something like this:
Customer views items in the catalog. Customer adds items to shopping cart. When the customer clicks Check Out, forms are presented for entering billing information and shipping information. The system sends the credit card information to the authorization server. The customer is notified of his or her order ...
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