System analysis and design is a six-phase problem-solving procedure for examining an information system and improving it. The six phases make up what is known as the systems development life cycle. The System Development Life Cycle (SDLC) is the step-by-step process that many organizations follow during systems analysis and design.
For further information about System Analysis and Design, kindly click the following links :
http://en.wikipedia.org/wiki/Systems_Development_Life_Cycle
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