Business Systems Analyst Week 4 Essay

410 words - 2 pages

Problems/Exercises Chapter 7 Questions 5, 16, & 17
1. Consider the E-R diagram in Figure 7-20. Based on this E-R diagram, answer the following questions:
o a. How many EMPLOYEES can work on a project?
Based on Figure 7-20 the degree shows many to many which indicates there are several projects with several employees working on them.

o b. What is the degree of the Used_on relationship?
The degree of the Used_on relationship shows “many” (maximum cardinality) coming from Tool and “minimum (cardinality of zero) to Task.

o c. Do any associative entities appear in this diagram? If so, ...view middle of the document...

o f. Could TOOL be modeled as an associative entity? Why or why not?
Yes it could, Tool could be modeled as an associative entity because there could be many tools that are needed for the project that the team is working on.
2. 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?

3. 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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