158 Chapter 4 Business Process and Functional Modeling QUESTIONS 1. Why is business process modeling important? 18. What are the major elements of an overview use case? 2. How do you create use cases? 19. What are the major elements of a detail use case? 3. Why do we strive to have about three to nine major 20. What is the viewpoint of a use case, and why is it use cases in a business process? important? 4. How do you create use-case diagrams? 21. What are some guidelines for designing a set of use 5. How is use-case diagramming related to functional cases? Give two examples of the extend associations modeling? on a use-case diagram. Give two examples for the 6. Explain the following terms: actor, use case, system include associations. boundary, relationship. Use layperson's language, as 22. Which of the following could be an actor found on a though you were describing them to a user. use-case diagram? Why? 7. Every association must be connected to at least one Ms. Mary Smith and one . Why? Supplier 8. What are some heuristics for creating a use-case diagram? Customer 9. Why is iteration important in creating use cases? Internet customer 10. What is the purpose of an activity diagram? Mr. John Seals 11. What is the difference between an activity and an Data entry clerk action? Database administrator 12. What is the purpose of a fork node? 23. What is CRUD? Why is it useful? 13. What are the different types of control nodes? 24. What is a walkthrough? How does it relate to verifica- 14. What is the difference between a control flow and an tion and validation? object flow? 25. What are the different roles played during a walk- 15. What is an object node? through? What are their purposes? 16. Explain how a detail use case differs from an overview 26. How are the different functional models related, and use case. When are each used? how does this affect the verification and validation of 17. How does an essential use case differ from a real use case? the models