2. Chapter 29 State Machine Diagrams

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

4. Fig. 29.1 Telephone

5. 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

6. Fig. 29.2 Notation

7. Fig. 29.3 Nested State Machines

8. Fig. 29.4 UI navigation

9. Fig. 29.5 NextGen Use case state machine

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