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The Development Process: Team-Developed Versus

8.5 The Development Process:

Life Cycle versus Prototyping  Life-cycle approach  Evolutionary prototyping approach iterative process Decision Support Systems and Intelligent Systems, Efraim Turban and Jay E. Aronson Copyright 1998, Prentice Hall, Upper Saddle River, NJ Life Cycle SDLC Approach and DSS  Inappropriate for Most DSS  Users and Managers may not understand their information and modeling needs Decision Support Systems and Intelligent Systems, Efraim Turban and Jay E. Aronson Copyright 1998, Prentice Hall, Upper Saddle River, NJ Prototyping Approach  Build a DSS in a series of short steps with immediate feedback from users – 1.Select an important subproblem to be built first – 2.Develop a small but usable system to assist the decision maker – 3.Evaluate the system constantly – 4.Refine, expand, and modify the system in cycles  Repeat – Stable and comprehensive system evolves Decision Support Systems and Intelligent Systems, Efraim Turban and Jay E. Aronson Copyright 1998, Prentice Hall, Upper Saddle River, NJ Prototyping  Short development time  Short user reaction time feedback from user  Improved users understanding of the system, its information needs, and its capabilities.  Low cost.  Disadvantages and Limitations – Gains might be lost through cycles  Combining prototyping with the critical success method Figure 8.3 Decision Support Systems and Intelligent Systems, Efraim Turban and Jay E. Aronson Copyright 1998, Prentice Hall, Upper Saddle River, NJ

8.6 Team-Developed Versus

User-developed DSS  DSS 1970s and early 1980s  Large-scale, complex systems  Primarily provided organizational support  Team efforts Decision Support Systems and Intelligent Systems, Efraim Turban and Jay E. Aronson Copyright 1998, Prentice Hall, Upper Saddle River, NJ Due to the Development of  Personal computers  Computer communication networks  PC-mainframe communication  Friendly development software  Reduced cost of software and hardware  Increased capabilities of personal computers  Enterprise-wide computing  Easy accessibility to data and models  Clientserver architecture Balance Decision Support Systems and Intelligent Systems, Efraim Turban and Jay E. Aronson Copyright 1998, Prentice Hall, Upper Saddle River, NJ

8.7 Team-Developed DSS

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