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Ihr Logo Chapter 6 Decision Support System Development Turban, Aronson, and Liang Decision Support Systems and Intelligent Systems, Seventh Edition
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Your Logo 6-2 Learning Objectives Understand the concepts of systems development. Learn PADI, the phases of SDLC. Describe prototyping. Understand which factors lead to DSS success or failure. Learn the importance of project management. Describe the three technology levels of DSS.
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Your Logo 6-3 Systems Development Life Cycle Four phases Planning Analysis Design Implementation Can return to other phases Waterfall model
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Your Logo 6-4 Tools Computer-aided software design tools Upper CASE – Creates systems diagrams Lower CASE Manages diagrams and code Integrated CASE Combination Analysis and design software Code debugging methods Testing and quality assurance tools
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Your Logo 6-5 Successful Project Management Establish a baseline Define scope of project Manage change Get support from upper management Establish timelines, milestones, and budgets based on realistic goals Involve users Document everything
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Your Logo 6-6 Implementation Failures Lack of stakeholder involvement Incomplete requirements Unrealistic expectations Project champion leaves Lack of skill or expertise Inadequate human resources New technologies
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Your Logo 6-7 Project Management Tools Project management software can allow: Collaboration among disparate teams Resource and program management Web enabled Aggregates and analyses project data
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Your Logo 6-8 Alternative Development Methodologies Parallel development Multiple development on separate systems RAD Quick development allowing fast, but limited functionality Phased development Sequential serial development Prototyping Rapid development of portions of projects for user input and modification Small working model or may become functional part of final system Throwaway prototyping Pilot test or simple development platforms
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Your Logo
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DSS Development Methodology Prototyping Iterative design Evolutionary development Middle out process Adaptive design Incremental design
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Your Logo DSS Prototyping Short steps Planning Analysis Design Prototype Immediate stakeholder feedback Iterative In development of prototype Within the system in general Evaluation integral part Control mechanism
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Your Logo 6-12 DSS Prototyping Advantages User and management involvement Learning explicitly integrated Prototyping bypasses information requirement Short intervals between iterations Low cost Improved user understanding of system Disadvantages Changing requirements May not have thorough understanding of benefits and costs Poorly tested Dependencies, security, and safety may be ignored Problem may get lost Reduction in quality Higher costs due to multiple productions
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Your Logo 6-13 Change Management Crucial to DSS People resistant to change Examine cause of change May require organizational culture shift Lewin-Schein change theory steps Unfreeze Create awareness of need for change People support what they help create Move Develop new methods and behaviors Create and maintain momentum Refreeze Reinforce desired changes Establish stable environment
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Your Logo DSS DSS is much more than just a DBMS, MBMS, GUI, interface, and knowledge component
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