INFS 6225 Object Oriented Systems Analysis

1
INFS 6225Object Oriented Systems Analysis
Design

• Chapter 4 Functional Modeling

2
Use-Case

• Illustrates the activities performed by the users
  of a system
• Depict the Users view of a system
• Are logical models
• Are technology-independent
• Can be used to describe current (As Is) or future
  (To Be) system

3
Use-Case 2 Parts

• Use-Case Descriptions Written, less formal
  documents that describe the functions of a system
• Use-Case Diagram Formal, graphical
  representation of the functions of a system
• Use-Case Descriptions are created first
  Use-Case Diagrams are then created from Use-Case
  Descriptions

4
Use-Case Description
Use Case Name ID Importance Level Primary
Actor Use Case Type Stakeholders and
Interests Brief Description Trigger Relation
ships (Association, Include, Extend,
Generalization) Normal Flow of
Events Subflows Alternate/Exceptional Flows
5
Use-Case Diagram
6
Use-Case Diagram Components
7
More Complex Diagrams
8
Practice Exercises