Problems and exercises MGMT 340

5. Consider the E-R

diagram in Figure 7-20. Based on this E-R diagram, answer the following

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a. How many EMPLOYEES

can work on a project?

b. What is the degree

of the Used_on relationship?

c. Do any associative

entities appear in this diagram? If so, name them.

d. How else could the

attribute Skill be modeled?

e. What attributes

might be attached to the Works_on relationship?

f. Could TOOL be

modeled as an associative entity? Why or why not?


diagram for Problem and Exercise 5.

16. The owner of two

pizza parlors located in adjacent towns wants to computerize and integrate

sales transactions and inventory management within and between both stores. The

point-of-sale component must be easy to use and flexible enough to accommodate

a variety of pricing strategies and coupons. The inventory management, which

will be linked to the point-of-sale component, must also be easy to use and

fast. The systems at each store need to be linked so that sales and inventory

levels can be determined instantly for each store and for both stores combined.

The owner can allocate $40,000 for hardware and $20,000 for software and must

have the new system operational in three months. Training must be short and

easy. Briefly describe three alternative systems for this situation and explain

how each would meet the requirements and constraints. Are the requirements and

constraints realistic? Why or why not?

17. Compare the

alternative systems from Problem and Exercise 16 using the weighted approach

demonstrated in Figure 7-19. Which system would you recommend? Why? Was

the approach taken in this and Problem and Exercise 16 useful even for this

relatively small system? Why or why not?

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