ITM 305 Study Guide - Final Guide: Use Case Diagram, Sequence Diagram, Activity Diagram

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 305
• Professor: Lin Ying Dong

Document Summary

Requires several interrelated models to create a complete set of specifications. Divide and conquer strategy toward complexity for better understanding: use case driven extending four specific models. Use case diagrams, use case descriptions, activity diagrams, system sequence diagrams. Used to describe the system uses from various point of views. Take each use case one by one and extend the requirements in more detail: object driven extending state chart diagram. Not use case driven but object driven. Use case diagram - a diagram showing the various user roles and the way those users interact with the system. Quick way to document the system events. Can be derived directly from the event table. Write out a narrative description & activity diagrams to show detail about the use case. System sequence diagram - a diagram showing the sequence of messages between external actors and the system during a use case or scenario.