1. Chapter 18

2. Use Case Realization Implement a Use Case
Implement one or more scenarios
(Use case is sum of all scenarios)

3. Fig. 18.1 Use Case Realization

4. Realization Use case SSD – contain: Systems operations
Build communications diagrams or sequence diagrams

5. Fig. 18.2 Sys Ops in Communication diagrams

6. Fig. 18.3 Sys Ops in Interaction diagrams

7. Operational Contracts
Fill in details in an interaction diagram
Look at enterItem Contract
Post condition : sli is created

8. Fig. 18.4 Apply post condition

9. Fig. 18.5 Design makeNewSale

10. Example NextGen
Now walk through the design

11. Fig Create new sale

12. Fig. 18.7 enterItem Interaction Diagram

13. Fig Data Class Diagram

14. Fig. 18.9 How to complete a sale

15. Fig getTotal

16. Fig & 18.12

17. Fig Payment

18. Fig Alt choice

19. Fig Log complete sale

20. Fig get balence

21. Fig Final DCD

22. Connect the UI

23. Fig enterItem

24. Fig Add getTotal

25. Fig Sys Start

26. Fig