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Chapter+3+-+1 - Information Systems Development Chapter 3...

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Information Systems Development Chapter 3
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On-Time and On-Budget Source: Computerworld. Killing Time on IT Projects . May 31, 2004
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System Development Process Set of activities, methods, best practices, deliverables, and automated tools that stakeholders use to develop and continuously improve Information Systems and software. Many variations Using a consistent process for system development: Create efficiencies that allow management to shift resources between projects. Produces consistent documentation that reduces lifetime costs to maintain the systems. Promotes quality.
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Capability Maturity Model (CMM) Standardized framework for assessing the maturity level of an organization’s Information System development and management processes and products. It consists of five levels of maturity: Level 1—Initial : System development projects follow no prescribed process. Level 2—Repeatable : Project management processes and practices are established to track project costs, schedules, and functionality. Level 3—Defined : Standard system development process (methodology) is purchased or developed. All projects use a version of this process. Level 4—Managed : Measurable goals for quality and productivity are established. Level 5—Optimizing : The standardized system development process is continuously monitored and improved based on measures and data analysis established in Level 4.
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Capability Maturity Model (CMM)
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Impact of System Development Process on Quality CMM Project Statistics for a Project Resulting in 200,000 Lines of Code Organizati on CMM Level Project Durati on (mont hs) Project Person- Months Number of Defects Shipped Median Cost ($ millions) Lowest Cost ($ millions) Highest Cost ($ millions) 1 30 600 61 5.5 1.8 100+ 2 18.5 143 12 1.3 .96 1.7 3 15 80 7 .728 .518 .933
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Life Cycle Versus Methodology System Life Cycle – Factoring the lifetime of an Information System into two stages, (1) systems development and (2) systems operation and maintenance. System Development Methodology – A formalized approach to the systems development process; a standardized development process that defines a set of activities, methods, best practices, deliverables, and automated tools that system developers and project managers use to develop and continuously improve Information Systems and software.
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System Life Cycle
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System Development Methodologies Architected Rapid Application Development (Architected RAD) Dynamic Systems Development Methodology (DSDM) Joint Application Development (JAD) Information Engineering (IE) Rapid Application Development (RAD) Rational Unified Process (RUP) Structured Analysis and Design eXtreme Programming (XP)
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Principles of System Development Get the system users involved. Use a problem-solving approach.
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Chapter+3+-+1 - Information Systems Development Chapter 3...

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