Ihr Logo Chapter 6 Decision Support System Development Turban, Aronson, and Liang Decision Support Systems and Intelligent Systems, Seventh Edition

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.

Your Logo 6-3 Systems Development Life Cycle  Four phases  Planning  Analysis  Design  Implementation  Can return to other phases  Waterfall model

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

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

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

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

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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DSS Development Methodology  Prototyping  Iterative design  Evolutionary development  Middle out process  Adaptive design  Incremental design

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

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

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

Your Logo DSS  DSS is much more than just a DBMS, MBMS, GUI, interface, and knowledge component