Systems Analysis

1
Systems Analysis Design

• UML Use Case and Object Modeling

2
What is UML

• UML stands for Universal Modeling Language
• It is a standard way for modeling software
• There are now a number of software packages on
  the market that will take UML and convert into a
  framework of code
• We will look at two diagramming components of
  UML
• Use Case Diagram
• Class Diagram

3
UML Capable Tools

• There are a number of tools that you can use to
  make UML diagrams and convert them into code and
  vice versa
• These are CASE tools they help make system
  development easier
• Some examples are
• Rational Rose
• Visio
• ArgoUML
• Microsoft Visual Modeler

4
Components of a Use Case Diagram

• Actor

• Use Case

• System

5
Sample Use Case Diagram

• Joses On-Line Sports Betting System
• Actors
• Gambler
• Accounting Department
• Game Information Department

6
Sample UseCase Diagram
Betting System
Enter Odds
Monitor Bet
Create Game
Place Bet
Enter Scores
Accounting System
Enter Deposit
Request Payment
Close Account
Create Account
Send Payment
7
Identify the Potential Objects

• Account
• Bet
• Game
• Payment
• Deposit

8
Components of a Class Diagram

• Class

• Relationship (assume 1-1 unless otherwise noted)

• Specialization / Inheritance

• Composition (If the whole is destroyed, so are
  its parts)

• Shared Aggregation (You can destroy the whole but
  the parts persist)

9
Class Diagram Example