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The system Development Cycle What is it The system development cycle is a method used to create a system where none has existed before andor modify an existing system It is sometimes simply called System Development It involves a number of stages representing a standard strategy for taking a problem from start to finish Two approaches 1 Conservative-working systematically through the steps 2 Radical-Cycling through the cycle several times until the final result is achieved The Steps The above diagram shows that the system development cycle is represented by 5 broad stages -Requirements Definition -Analysis -Design -Implementation -Operation and Evaluation Requirements Definition Also known as Requirements analysis orFeasibility study -Duration is relatively short compared to the rest of the development cycle -It is important to get it right the first time else mistakes could be costly In the worst case a large oversight would require starting over from step one Aim The aim of this stage is to see how the present system functions and to identify the nature of the problem problem definition once the problem has been identified a report is compiled called a feasibility report that report contains - 1 Objectives of the initial study eg why a mail order firm takes longer than a week to dispatch orders 2 depth of the initial study eg Were interviews conducted with staff involved 3 recommendations including an outline of the proposed development eg redesign current computer system After studying the report management have three options - a get a second opinion b do nothing c follow recommendations If the investigation confirms that there is a problem further work and study may be needed Analysis Aim The aim of the analysis stage is to answer the questions who what when why The three
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