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Chapter 15 Systems Development

Management Information Systems, 3rd EditionEffy Oz. 2. Learning Objectives. When you finish this chapter, you will:Understand the systems development life cycle.Be able to list and explain the pros and cons of prototyping.Understand how software tools facilitate the monitoring and controlling of

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Chapter 15 Systems Development

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    1. Management Information Systems, 3rd Edition Effy Oz 1 Chapter 15 Systems Development

    2. Management Information Systems, 3rd Edition Effy Oz 2 Learning Objectives When you finish this chapter, you will: Understand the systems development life cycle. Be able to list and explain the pros and cons of prototyping. Understand how software tools facilitate the monitoring and controlling of systems development.

    3. Management Information Systems, 3rd Edition Effy Oz 3 Learning Objectives Recognize the difficulties involved in systems development. Be able to list the advantages and disadvantages of different system conversion strategies. Understand the concept of systems integration.

    4. Management Information Systems, 3rd Edition Effy Oz 4 Why Develop an IS? Three phenomena that trigger IS development An opportunity (proactive) A problem (reactive) A directive

    5. Management Information Systems, 3rd Edition Effy Oz 5 The Systems Development Life Cycle (SLDC)

    6. Management Information Systems, 3rd Edition Effy Oz 6 The Systems Development Life Cycle (SLDC) Analysis Determines what need the system will satisfy Investigation Developers interview managers and perspective users to determine business needs. Three feasibility studies performed.

    7. Management Information Systems, 3rd Edition Effy Oz 7 The Systems Development Life Cycle (SLDC)

    8. Management Information Systems, 3rd Edition Effy Oz 8 The Systems Development Life Cycle (SLDC) The Technical Feasibility Study Ensures hardware and software exist to build the system The Economic Feasibility Study Benefits of the system weighed against the cost The Operational Feasibility Study Determines if system will be used as intended Requirements Definition Specific requirements of system defined

    9. Management Information Systems, 3rd Edition Effy Oz 9 The Systems Development Life Cycle (SLDC)

    10. Management Information Systems, 3rd Edition Effy Oz 10 The Systems Development Life Cycle (SLDC)

    11. Management Information Systems, 3rd Edition Effy Oz 11 The Systems Development Life Cycle (SLDC) Design Logical Design Translation of user requirements into detailed functions of the system Physical Design Construction Systems Testing

    12. Management Information Systems, 3rd Edition Effy Oz 12 The Systems Development Life Cycle (SLDC)

    13. Management Information Systems, 3rd Edition Effy Oz 13 The Systems Development Life Cycle (SLDC)

    14. Management Information Systems, 3rd Edition Effy Oz 14 The Systems Development Life Cycle (SLDC)

    15. Management Information Systems, 3rd Edition Effy Oz 15 The Systems Development Life Cycle (SLDC)

    16. Management Information Systems, 3rd Edition Effy Oz 16 The Systems Development Life Cycle (SLDC) Implementation Training Conversion Parallel Conversion Phased Conversion Cold Turkey Conversion Pilot Conversion

    17. Management Information Systems, 3rd Edition Effy Oz 17 The Systems Development Life Cycle (SLDC)

    18. Management Information Systems, 3rd Edition Effy Oz 18 The Systems Development Life Cycle (SLDC) Support

    19. Management Information Systems, 3rd Edition Effy Oz 19 Prototyping Systems developed using an iterative process Purpose is to develop a working model as quickly as possible, which can be tweaked and revised Significantly shortens systems development backlog Can increase risk of incompatibility and other unforeseen mishaps

    20. Management Information Systems, 3rd Edition Effy Oz 20 Prototyping

    21. Management Information Systems, 3rd Edition Effy Oz 21 Prototyping

    22. Management Information Systems, 3rd Edition Effy Oz 22 Computer-Aided Software Engineering Computer-Aided Software Engineering (CASE tools) System development programs that ease and speed design and construction of new ISs Application generators I-CASE tools Rapid Application Development (RAD)

    23. Management Information Systems, 3rd Edition Effy Oz 23 Project Management Project Management Tools Project Evaluation and Review Technique (PERT) PERT chart shows events, required activities, and relationships Advantage: Communication of interdependencies among activities Gantt Chart Represents activities and start and completion times, but not the relationships among activities Advantage: Simple and linear

    24. Management Information Systems, 3rd Edition Effy Oz 24 Project Management

    25. Management Information Systems, 3rd Edition Effy Oz 25 Project Management Project Management Goals Complete the project on time. Complete the project within budget. Meet requirements. Meet expectations.

    26. Management Information Systems, 3rd Edition Effy Oz 26 Project Management

    27. Management Information Systems, 3rd Edition Effy Oz 27 Project Management Project Management Functions Communication Management Schedule Management Quality Management Financial Management Resource Management

    28. Management Information Systems, 3rd Edition Effy Oz 28 Systems Development Led by End Users JAD: An example of User-led Systems Development Joint Application Development (JAD): method to be used in SDLU Uses six-step process to take the team through planning and design

    29. Management Information Systems, 3rd Edition Effy Oz 29 Systems Development Led by End Users

    30. Management Information Systems, 3rd Edition Effy Oz 30 Systems Development Led by End Users JAD Critical Success Factors All participants must be committed to JAD process. Customers and IS people must agree on project’s scope. Sponsor must be supportive and involved. Team members must be empowered decision makers. Business objectives must be clearly defined. Business process must be understood. Team members must be able to meet two or more days per week. Members must be committed to the team.

    31. Management Information Systems, 3rd Edition Effy Oz 31 Systems Integration Takes a look at the information needs of an entire organization (or a major division) Analysts integrate existing systems so that: Data can flow more easily among business units. Users can access different types of data via a single interface.

    32. Management Information Systems, 3rd Edition Effy Oz 32 Ethical and Societal Issues Should IS Professionals Be Certified? Malfunctioning ISs Faulty systems may wreak havoc, causing financial damage or even death Should IS professionals be certified based on the high investment and risk involved in their work?

    33. Management Information Systems, 3rd Edition Effy Oz 33 Ethical and Societal Issues Should IS Professionals Be Certified? Certification Pros Protect potential employers Protect clients of consultants Fewer software-related failures Certification Cons Difficult to measure software competence May create a “closed shop:” decreased competition, decreased incentive to improve skills

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