1. Up to this point you seem to have had excellent rapport with Kevin Cahoon, the owner of a musical instrument manufacturing company. When you showed him a set of data flow diagrams you drew, he wasn't able to see how the system you were proposing was described in the diagrams.
a. In a paragraph, write down in general terms how to explain a data flow diagram to a user. Be
sure to include a list of symbols and what they mean.
b. It takes some effort to educate users about data flow diagrams. Is it worthwhile to share them
with users? Why or why not? Defend your response in a paragraph.
c. Compare data flow diagrams to use cases and use case scenarios. What do data flow diagrams
show that use case diagrams have a difficult time trying to explain?
5. Perfect Pizza wants to install a system to record orders for pizza and chicken wings. When regular customers call Perfect Pizza on the phone, they are asked their phone number. When the number is typed into a computer, the name, address, and last order date is automatically brought up on the screen. Once the order is taken, the total, including tax and delivery, is calculated. Then the order is given to the cook. A receipt is printed. Occasionally, special offers (coupons) are printed so the customer can get a discount. Drivers who make deliveries give customers a copy of the receipt and a coupon (if any). Weekly totals are kept for comparison with last year's performance. Write a summary of business activities for taking an order at Perfect Pizza.
Chapter 8
3. Jorge Alvarez, the manager of the bookstore that your systems analysis team has been working with to build a computerized inventory system, thinks that one of your team members is making a nuisance of himself by asking him extremely detailed questions about data items used in the system. For example, he asks, "Jorge, how much space, in characters, does the listing of an ISBN take?"
a. What are the problems created by going directly to the manager with questions concerning data dictionary entries? Use a paragraph to list the problems you can see with your team member's approach.
b. In a paragraph, explain to your team member how he can better gather information for the data
dictionary.
4. Michael Bush owns a store specializing in travel gear and clothes. Manufacturers have their own coding, but there are many manufacturers. Set up data elements for six different travel hats from three different suppliers.
Chapter 9
1. Clyde Clerk is reviewing his firm's expense reimbursement policies with the new salesperson, Trav Farr. "Our reimbursement policies depend on the situation. You see, first we determine if it is a local trip. If it is, we only pay mileage of 18.5 cents a mile. If the trip was a one-day trip, we pay mileage and then check the times of departure and return. To be reimbursed for breakfast, you must leave by 7:00 A.M., lunch by 11:00 A.M., and have dinner by 5:00 P.M. To receive reimbursement for breakfast, you must return later than 10:00 A.M., lunch later than 2:00 P.M., and have dinner by 7:00 P.M. On a trip lasting more than one day, we allow hotel, taxi, and airfare, as well as meal allowances. The same times apply for meal expenses." Write structured English for Clyde's narrative of the reimbursement policies.
3. Draw a decision table for the reimbursement policy in Problem 1.
Chapter 10
7. You are ready to begin UML modeling for the Kirt Clinic. Draw a class diagram that includes a physician, a patient, an appointment, and a patient's bill. Do not get the insurance company involved.
9. Write a sample use case scenario for a patient who sees a physician in the Kirt Clinic