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The System Development Life Cycle The Systems Development Life Cycle SDLC serves as a method that assures Information Systems IS being developed meet the requirements and needs of an organization or company This methodology creates processes and guidelines managing the planning system analysis design implementation and maintenance of IS within a company The primary objectives of any SDLC are to implement an IS that 1 meets or exceeds customer expectations 2 work efficiently and effectively with the current and planned information technology structure and 3 are inexpensive to maintain and cost-effective to upgrade DOJ 2000 The SDLC system provides an overall structured approach IS system development maintenance and operation The five phases of the SDLC must be executed sequentially and are extremely dependent on the success of the previous step The first three steps are the most critical of system development If during the later phases of system development a problem is identified or arises the likelihood of successful implantation and operation are small and all of the work in the previous steps is wasted Therefore much time is spent in planning analysis and system design so no rework is required System Planning The first phase of SDLC begins with the identification of a need for new business technology At this point a veteran IT project manager is chosen to head the project Once a concept is developed it is reviewed to determine its feasibility and appropriateness Will it enhance the company Is it worth investing in Will it be user friendly During this crucial phase it is important to define the problem and distinguish from the symptoms Equally important is to clearly document the business need so that all including management are aware of the need for new information technology Systems Analysis In this phase the development team studies the existing IT infrastructure Here they investigate the need for possible software automation The user requirements are formally defined in terms of data required functions
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