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systems analysis and design using matlab
Systems Analysis And Design 3rd Edition Alan Dennis, Barbara Wixom, David Tegarden - Solutions
16. What is meant by authentication? What is its role in securing transactions?
15. Explain the difference between a symmetric encryp¬tion algorithm and an asymmetric encryption algorithm.
14. What is meant by system value? Explain how var¬ious systems can have a different value to the organization.
13. Describe the types of security requirements and how they may influence architecture design.
12. Describe the types of performance requirements and how they may influence architecture design.
11. Describe the types of operational requirements and how they may influence architecture design.
10. What is meant by total cost of ownership? How does this factor affect the choice of architecture?
5. Explain the client-server architecture.
4. Explain the client-based architecture.
3. Explain the server-based architecture.
2. Would you create multilingual capabilities for any application that would be available to non-English speaking people? Think about Web sites that exist today.
1. How would you decide how much to support users who speak languages other than English?
6. What would you recommend to avoid similar losses in the future?
5. How important is the (unstated) issue of reliability in a system like this?
4. What were the effects of such stringent availability require¬ments for this system?
3. If you had been in charge of the Oxford project, what things would you have considered when planning the system capacity?
2. What alternatives do you think Monster.com consid¬ered?
1. What are the primary two or three nonfunctional requirements that have influenced Monster.com's application architecture?
22. Assume you and your friends are starting a small business painting houses in the summertime. You need to buy a software package that handles the financial transactions ofthe business. Create an alter¬native matrix that compares three packaged systems(e.g., Quicken, Microsoft Money,
21. Assume you are leading a project that will imple¬ment a new course registration system for your uni¬versity. You are thinking about using either a pack¬aged course registration application or outsourcing the job to an external consultant. Create a request for proposal (REP) to which
20. Assume you are part of a development team that is working on a new warehouse management system.You have the task ofinvestigating software packages that are available through application service providers. Using the World Wide Web, identify at least two potential sources of such software? What
19. Assume you are developing a new system for a multi-state chain of video stores. Each store will run a fairly standardized set of video store processes(cataloging video inventory, customer registration, video rentals, video returns, overdue fees, etc.). In addition, each store’s system will be
18. Assume you are developing a new system for a local real estate agency. The agency wants to keep a data¬base of its own property listings and also wants to have access to the citywide multiple listings service used by all real estate agents. Which design strategy would you recommend for the
17. Should the analysis phase be eliminated or reduced when we intend to use a software package instead of custom development or outsourcing?
16. What is the purpose of the weighted alternative matrix? Describe its typical content.
15. What information is typically conveyed in an RFP?
14. What is the purpose of a request for proposal(RFP)? How does it differ from the RFI?
13. Explain the distinctions between time and arrange¬ments, fixed-price, and value-added outsourcing contracts. What are the pros and cons of each?
12. Describe the role of application service providers(ASPs) in obtaining new systems. What are their advantages and disadvantages?
11. What is involved with systems integration? When is it necessary?
10. What is meant by creating a workaround for a soft¬ware package? What are the disadvantages of workarounds (if any)?
9. What is meant by customizing a software package?
8. What are some problems associated with using packaged software? How can these problems be minimized?
7. What circumstances favor using outsourcing to obtain the new system?
6. What circumstances favor the use of packaged software?
5. What circumstances favor the custom design strategy?
4. Describe the three primary strategies that are avail¬able to obtain a new system.
3. List and describe the contents of the system speci¬fication.
2. Describe the primary activities of the design phase ofthe SDLC.
1. Summarize the distinctions between the analysis phase and the design phase ofthe SDLC.
4. Do you think the city of Chicago got a good deal from this arrangement? Why or why not?
3. Would it have been better to hire an external profes¬sional project manager to coordinate the project?Why or why not?
2. Why did the company select a project manager from within the organization?
1. What are the risks in building a custom system with¬out having the right technical skills available within the organization?
32. You have been given a file that contains the follow¬ing fields relating to CD information. Using the steps of normalization, create a logical data model that represents this file in third normal form. The fields include the following:Musical group name Musicians in group Date group was formed
31. Apply the steps of normalization to validate the models you drew in Exercise D.
30. Create a data model for one ofthe processes in the end-of-chapter Exercises for Chapter 6. Explain how you would balance the data model and process model.
29. Describe the assumptions that are implied from the data model shown at the top ofthis page.
28. Create metadata entries for the following data model components and, ifpossible, input the entries into a computer-aided software engineering (CASE)tool of your choosing:Entity—product Attribute—product number Attribute—product type Relationship—company makes many products, and any one
27.. Visit a Web site that allows customers to order a product over the Web (e.g., Amazon.com). Create a data model that the site needs to support its business process. Include entities to show what types of information the site needs. Include attributes to rep¬resent the type of information the
26.Examine the data models that you created for Exer¬cise D. How would the respective models change (if at all) on the basis of these corresponding new assumptions?Two patients have the same first and last names.Researchers can be associated with more than one institution.The store would like to
25.. Draw an entity relationship diagram (ERD) for the following situations:
24.. Draw the following relationships. Would the rela¬tionships be identifying or nonidentifying? Why?A patient must be assigned to only one doctor, and a doctor can have many patients.An employee has one phone extension, and a unique phone extension is assigned to an employee.A movie theater
23. Draw a data model for the following entities, con¬sidering the entities as representing a system for a patient billing system and including only the attrib¬utes that would be appropriate for this context:Patient (age, name, hobbies, blood type, occupa¬tion, insurance carrier, address,
22. Draw data models for the following entities:Movie (title, producer, length, director, genre)Ticket (price, adult or child, showtime, movie)Patron (name, adult or child, age)
21. What is a CRUD matrix? How does it relate to process models and data models?
20. Describe how the data model and process model should be balanced against each other.
19. Describe the analysis that is applied to a data model in order to place it in third normal form(3NF).
18. Describe the analysis that is applied to a data model in order to place it in second normal form(2NF).
17. Describe the analysis that is applied to a data model in order to place it in first normal form(INF).
16. What is the purpose of normalization?
15. Is an intersection entity dependent or independent?Explain your answer.
14. Describe the three step process of creating an inter¬section entity.
13. What is the purpose of an intersection entity? How do you know one is needed in an ERD?
12. Explain the distinction between identifying and non-identifying relationships.
11. What is an independent entity? What is a dependent entity? How are the two types of entities differenti¬ated on the data model?
10. What is metadata? Why is it important to system developers?
9. Describe in terms a businessperson could under¬stand what is meant by the cardinality and modality of a relationship between two entities.
8. What is meant by a concatenated identifier?
7. A team of developers is considering including“warehouse” as an entity in their data model. The company for whom they are developing the system has just one warehouse location. Should warehouse be included? Why or why not?
6. Define what meant by a relationship in a data model. How should a relationship be named? What information about a relationship should be stored in the CASE repository?
5. Define what meant by an attribute in a data model.How should an attribute be named? What informa¬tion about an attribute should be stored in the CASE repository?
4. Define what meant by an entity in a data model. How should an entity be named? What information about an entity should be stored in the CASE repository?
3. What type of high-level business rule can be stated by an ERD? Give two examples.
2. What is the purpose of developing an identifier for an entity?
1. Provide three different options that are available when selecting an identifier for a student entity.What are the pros and cons of each option?
3. Use the steps of normalization to put your data model in 3NF. Describe how you know that it is in 3NF.
2. Which entities are dependent? Which are inde¬pendent?
1. Create a data model. Include entities, attributes, iden¬tifiers, and relationships.
3. What relationships exist between the entities that you identified? Label the relationships appropriately, and denote the cardinality and modality of each relationship.
2. What attributes would you list for each entity? Select an identifier for each entity, if possible.
1. What entities would you include on a data model?
3. How can users help analysts create better ERDs?
2. When is it appropriate to involve users in the ERD cre¬ation process?
1. Based on these two stories, what do you think is the user's role in data modeling?
6. List two business rules that are communicated by your ERD.
5. What is the modality for each relationship? Depict this on your drawing.
4. What is the cardinality for each relationship? Depict this on your drawing.
3. Draw the appropriate relationships between the enti¬ties and label them.
2. Provide some basic attributes for each entity, and select an identifier, if possible.
1. Draw the four entities that belong on this data model.
30. Draw a level 0 data flow diagram (DFD) for the uni¬versity library system in exercise J, Chapter 5,
29. Draw a level 0 data flow diagram (DFD) for the Ofthe-Month Club system in exercise I, Chapter 5.
28. Draw a level 0 data flow diagram (DFD) for the Pic¬nics R Us system in exercise H, Chapter 5,
27. Draw a level 0 data flow diagram (DFD) for the health club system in exercise G, Chapter 5,
26. Draw a level 0 data flow diagram (DFD) for the video store system in exercise F, Chapter 5,
25. Draw a level 0 data flow diagram (DFD) for the real estate system in exercise E, Chapter 5,
24. Draw a level 0 data flow diagram (DFD) for the uni¬versity system in exercise D, Chapter 5,
23. Draw a level 0 data flow diagram (DFD) for the den¬tist office system in exercise B, Chapter 5,
22. Draw a level 0 data flow diagram (DFD) for the process of buying glasses in Exercise A, Chapter 5,
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