a. A supermarket needs to develop software to encourage regular customers. For this, the customer needs to
supply his name, address, telephone number and driving license number. A customer is assigned a unique
customer number (CN) by the computer. When a customer makes a purchase, the value of the purchase is
credited against his CN. At the end of each year, surprise gifts to 10 customers who have made the highest
purchase is given. In addition, a 22 carat gold coin is given to every customer who have made a purchase
over Ksh10,000. The entries are reset on the last day of the year.
i. Draw the context diagram (3 Marks)
ii. Give data dictionary entries for: (3 Marks)
? Address
? CN
? Gold-coin-winner-list
? Total-sales
b. Describe data dictionary and its components. (4 Marks)
c. Explain COCOMO model with its relevant equations and attributes of cost drivers used in COCOMO
model. (4 Marks)
d. Explain building blocks for CASE. (6 Marks)

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