1. Object Oriented Approach

2. Simple Use Case with an Actor2 2

3. Use Case Diagram with Automation Boundary and Alternate Actor Notation3 3

4. All Use Cases Involving Customer as Actor4 4

5. Use Cases of RMO Order Entry Subsystem5 5

6. Activity Diagram— Telephone Order Scenario6 6

7. Activity Diagram— Web Order Scenario7 7

8. System Sequence Diagram (SSD) Notation8 8

9. Repeating Message 9 9

10. Activity Diagram of the Telephone Order Scenario10 10

11. Resulting SSD for the Telephone Order Scenario11 11

12. SSD of the Web Order Scenario for the Create New Order Use case12 12

13. Simple State Machine Diagram for a Printer13 13

14. Composite States and Concurrency—States within a State14 14

15. First-Cut State Machine Diagram for Order15 15