TutorialWeek07 - Systems Analysis - Tutorial Week 7-...

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Systems Analysis - Tutorial Week 7- Solution NOTE: All page numbers referred are from the textbook, Satzinger, J, Jackson, R.B. & Burd, S.D. (2007) . Systems analysis and design in a changing world, (5 th ed.). Boston, Massachusetts: Course Technology. Review Questions 1. List at least three different types of DFDs. What is each diagram type used to represent? 2. List the five component parts (symbols) of a DFD. Briefly describe what each symbol represents. 3. How does an analyst determine whether a person or organization should be represented on a DFD as an external agent or by one or more processes? 4. Processes on an event-partitioned DFD can be described by a detailed DFD or a process specification. How does an analyst determine which is the most appropriate form of description? 5. Describe how each column of an event table is represented on a DFD (that is, what symbols are used?). 6. How are entities from the ERD represented on a DFD? How are relationships from the EFD represented on a DFD? Thinking Critically 1. Assume that you are preparing a DFD to describe the process of creating, approving, and closing a mortgage loan by a mortgage broker. Should the broker be represented as an external agent or by one or more processes? Why? What about the closing agent, the credit bureau, and the bank that issues the mortgage note? 2. Examine the course registration system described in Figure 6-6. Are there any other processes that would be required to implement a fully functioning system? Hint: Black holes and miracles may indicate processing steps that were left out of the DFD. 3. Develop a detailed DFD that decomposes process 3 ( Update order ) in Figure 6-12. What similarities are there between your detailed DFD and the one shown in Figure 6-14? Try to redraw all three DFDs to eliminate redundancies. Are your revised DFDs more or less readable than the original diagrams? CASE STUDIES All case study details available in text book, mainly located in Chapter 5. Page 1 of 4
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Case Study: The Real Estate Multiple Listing Service System The Real Estate Multiple Listing Service System The Real Estate Multiple Listing Service system supplies information that local real estate agents use to help them sell houses to their customers. During the month,
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TutorialWeek07 - Systems Analysis - Tutorial Week 7-...

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