Use Case Diagrams College of Alameda Copyright © 2007 Patrick McDermott

A Use Case has Scenarios Use Case Scenario Class Requirements Program Spec Class Diagram

UC Diagrams “Draw a use case diagram to show what your system IS without getting into unnecessary detail.” —H1 st OOA&D The Blueprints for the system The Big Picture 10,000 foot view Claude Monet ( ) Boulevard des Capucines 1873

 Box  The Box is the System Boundary You must provide everything inside You will NOT provide anything outside Use it to show Scope

UC Actor  Outside The System Else would be represented inside

Use Cases Business “Stories” Can become Test Cases User Rep: walking use case Enter Hours Revise Schedule Report Hours Boss HRIS Worker

Use Case Diagrams

A Use Case Diagram Enter Hours Revise Schedule Report Hours Boss HRIS Use Case 1 Use Case 2 Use Case 3 Actor A Actor C Actor B Worker Cartouche Actor Use Case

Chart Form