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systems analysis and design using matlab
Systems Analysis And Design 3rd Edition Alan Dennis, Barbara Wixom, David Tegarden - Solutions
27. Using the Web, review one of the products listed below. What are the main features and functions of the software? In what companies has the database management system (DBMS) been implemented, and for what purposes? According to the informa?
24. What are the key issues in deciding between using perfectly normalized databases and denormalized databases?
23. Why is it important to understand the initial and pro¬jected size of a database during the design phase?
22. Describe what should be considered when estimat¬ing the size of a database.
21. What is an index, and how can it improve the per¬formance of a system?
20. What is the difference between interfile and intrafile clustering? Why are they used?
19. Describe several techniques that can improve per¬formance of a database.
18. Describe three situations that can be good candi¬dates for denormalization.
17. What is the purpose of normalization?
16. What are the two dimensions in which to optimize a relational database?
15. Name three ways that null values in a database can be interpreted. Why is this problematic?
14. Describe the purpose ofthe primary and foreign keys.
13. Describe the metadata associated with the physical ERD.
12. What are the differences between the logical and physical ERDS?
9. How does the multidimensional database store data?
2. How are a file and a database different from each other?
1. Describe the two steps to data storage design.
4. On the basis of your answers, what kind of data stor¬age format(s) do you recommend for this system?
3. What different kinds of data will this system use?
2. Does it have characteristics of more than one?
1. What kind of system is this?
25. Draw a physical level 0 DFD for the following sys¬tem and compare it to the logical model that you cre¬ated in Chapter 6. A Video Store (AVS) runs a series offairly standard video stores. Before a video can be put on the shelf, it must be catalogued and entered into the video database. To
24.Some buyers have an interest in one specific house.In this case, AREI prints information from its data¬base, which the real estate agent uses to help show the house to the buyer (a process beyond the scope of the system to be modeled). Other buyers seek AREI’s advice in finding a house that
23. Create a physical level 0 DFD for the following, and compare it to the logical model that you created in Chapter 6. A Real Estate Inc. (AREI) sells houses.People who want to sell their houses sign a contract with AREI and provide information on their house.This information is kept in a database
21. Is program design more or less important when using event-driven languages such as Visual Basic?
20. What is the difference between structured program¬ming and event-driven programming?
19. Describe the purpose of program specifications.
18. List and discuss three ways to ensure the overall quality of a structure chart.
17. What is meant by the characteristics of fan-in and fan-out? What are their roles in structure chart quality?
16. List the seven types of coupling. Why do the vari¬ous types of coupling range from good to bad? Give an example of good coupling and an example of bad coupling.
15. What is meant by the characteristic of module cou¬pling? What is its role in structure chart quality?
13. What is meant by the characteristic of module cohesion? What is its role in structure chart quality?
10. What does a data couple depict on a structure chart? A control couple?
4. What is a human-machine boundary?
59. What are several reasons why planning ahead may have helped E&Y win?
58. Design a storyboard for Exercise I in Chapter 6,
57. Draw an ISD for the DFD in Exercise I in Chapter 6,
56. Develop the interface standards (omitting the interface template) for the DFD in Exercise I in Chapter 6,
55. Develop an HTML prototype for Exercise F in this chapter.
54. Develop an HTML, prototype for Exercise E in this chapter.
53. Design a storyboard for Exercise E in Chapter 6,
52. Draw an ISD for the DFD in Exercise E in Chapter 6,
51. Design an interface template for Exercise E.
50. Develop the interface standards (omitting the interface template) for the DFD in exercise E in Chapter 6,
49. Develop two use scenarios for the DFD in exercise E in Chapter 6,
49. Develop the interface standards (omitting the inter¬face template) for the DFD in exercise C in Chap¬ter 6,
48.. Draw an ISD for the DFD in exercise C in Chapter 6.
47. Develop two use scenarios for the DFD in exercise C in Chapter 6,
45. Draw an ISD for a Web site that sells some retail products (e.g., books, music, clothes).
44. Develop two use scenarios for a Web site that sells some retail products (e.g., books, music, clothes).
43. How would you improve the form in Fig. 10-4?
42. What do you think are three common mistakes that novice analysts make in interface design?
41. When would you use electronic reports rather than paper reports, and vice versa?
40. Describe five types of outputs.
39. Explain three principles in the design of outputs.
38. Describe five types of input validation methods.
37. Why is input validation important?
36. Compare and contrast on-screen list boxes and drop-down list boxes. When would you use one ver¬sus the other?
35. Compare and contrast check boxes and radio but¬tons. When would you use one versus the other?
34. Describe five types of inputs.
33. Describe four devices that can be used for source data automation.
32. Why is capturing data at the source important?
30. Explain three principles in the design of inputs.
29. What is context-sensitive help? Does your word processor have context-sensitive help?
28. What are the key factors in designing an error message?
27. Describe five types of messages.
26. Under what circumstances would you use a drop¬down menu versus a tab menu?
25. Compare and contrast four types of menus.
24. Why are menus the most commonly used naviga¬tion control?
23. Describe four types of navigation controls.
22. Explain the differences between object-action order and action-object order.
21. How can you prevent mistakes?
20. Describe three basic principles of navigation design.
19. What type of interface evaluation did you perform in the “Your Turn 10.1”?
18. Under what conditions is heuristic evaluation jus¬tified?
17. Compare and contrast the four types of interface evaluation.
16. Why is it important to perform an interface evalua¬tion before the system is built?
15. Compare and contrast the three types of interface design prototypes.
14. Why do we prototype the user interface design?
12. Why are interface standards important?
11. What is an interface structure diagram (ISD), and why is it used?
10. What are use scenarios, and why are they important?
9. Describe the basic process of user interface design.
8. How can different parts ofthe interface be consistent?
5. Under what circumstances should densities be low?High?
4. What is white space, and why is it important?
3. Why is content awareness important?
2. What are three fundamental parts of most user interfaces?
5. What types of reports are most suited to electronic for¬mat? What types of reports are less suited to electronic reports?
4. What concerns could this problem raise about the rest of the system?
3. Suppose you were a systems analyst at one of the lead¬ing ERP vendors (e.g., SAP, PeopleSoft, Baan). How could you apply the interface design principles and techniques in this chapter to improve the ease of use of your system?
2. What trade-offs were involved in the decision?
1. Why do you think the team chose to use a language prototype rather than a storyboard or HTML proto¬type?
28. You have been selected to find the best client-server computing architecture for a Web-based order entry system that is being developed for L.L. Bean. Write a short memo that describes to the project manager your reason for selecting an n-tiered architecture over a two-tiered architecture. In
27. Using the Web, locate examples of a mainframe com¬ponent, a minicomputer component, and a micro¬computer component. Compare the components in terms of price, speed, available memory, and disk storage. Do you find large differences in prices when the performances ofthe components are
24. What do you think are the most important security issues for a system?
21. What is the purpose of the hardware and software specification?
19. Explain the difference between concurrent multilin¬gual systems and discrete multilingual systems.
18. Describe the types of cultural and political require¬ments and how they may influence architecture design.
17. Describe the usefulness ofthe Internet’s public key infrastructure (PKI).
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