Book - System Analysis & Design : An Object-Oriented Approach with UML By Alan Dennis and Barbara Haley Wixom
## Chapter 7 (pg. 277 - 279)
* Questions: 1, 6 (10 points each)
* Minicases: 1 (30 points)
## Chapter 8 (pg. 323 - 325)
* Questions: 1, 17 (10 points each)
* Exercises: F, G (15 points each)
Chapter 7 : Moving on to Design
Questions
1. Explain the primary dif erence between an analysis model and a design model.
6. What is a layer? Name the different layers.
Minicases
1. Susan, president of MOTO, Inc., a human resources management i rm, is rel ecting on the client management sot ware system her organization purchased four years ago.
At that time, the i rm had just gone through a major growth spurt, and the mixture of automated and manual procedures that had been used to manage client accounts became unwieldy. Susan and Nancy, her IS department head, researched and selected the package that is currently used. Susan had heard about the sot ware at a professional conference she attended, and, at least initially, it worked fairly well for the i rm. Some of their procedures had to change to i t the package, but they expected that and were prepared for it.
Since that time, MOTO, Inc., has continued to grow, not only through an expansion of the client base but also through the acquisition of several smaller employment-related businesses. MOTO, Inc., is a much dif erent business than it was four years ago. Along with expanding to of er more diversii ed human resources management services, the i rm’s support staf has also expanded. Susan and Nancy are particularly proud of the IS department they have built up over the years.
Using strong ties with a local university, an attractive compensation package, and a good working environment, the IS department is well staf ed with competent, innovative people, plus a steady stream of college interns that keeps the department fresh and lively. One of the IS teams pioneered the use of the Internet to of er MOTO’s services to a whole new market segment, an experiment that has proved very successful.
It seems clear that a major change is needed in the client-management sot ware, and Susan has already begun to plan i nancially to undertake such a project. h is sot ware is a central part of MOTO’s operations, and Susan wants to be sure that a high-quality system
is obtained this time. She knows that the vendor of their current system has made some revisions and additions to its product line. A number of other sot ware vendors also of er products that may be suitable. Some of these vendors did not exist when the
purchase was made four years ago. Susan is also considering Nancy’s suggestion that the IS department develop a custom sot ware application.
a. Outline the issues that Susan should consider that would support the development of a custom sotfware application in-house.
b. Outline the issues that Susan should consider that would support the purchase of a software package.
c. Within the context of a systems-development project, when should the decision of make-versus-buy be made? How should Susan proceed? Explain your answer.
Chapter 8 : Class and Method Design
Questions
1. What are the basic characteristics of object-oriented systems?
17. What are patterns, frameworks, class libraries, and components? How are they used to enhance the evolving design of the system?
Exercises
F. Describe the dif erence in meaning between the following two class diagrams. Which is a better model? Why?
G. From a cohesion, coupling, and connascence perspective, is the following class diagram a good model? Why or why not?
