1. State Machine Diagrams
Chapter 29
State Machine Diagrams

2. Represent state of an object Behavior as reaction to events
Sate Machine Diagrams
Represent state of an object
Behavior as reaction to events

3. Fig Telephone

4. Does an object have state?
State Machines Models
Does an object have state?
Objects are state dependent -
React differently to the same input
Business systems tend to not have state dependent objects
Process control, protocol handles, device controls - often are state dependent

5. Fig Notation

6. Fig. 29.3 Nested State Machines

7. Fig UI navigation

8. Fig. 29.5 NextGen Use case state machine

9. UP does not define specific functions for State Machine Diagrams
Summary
UP does not define specific functions for State Machine Diagrams
Another useful tool
State machines appear in many places!