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                 =                                   = The Systems Development Life Cycle (SDLC), or //Software Development Life Cycle// in [|systems engineering] and [|software engineering], is the process of creating or altering systems, and the models and [|methodologies] that people use to develop these systems. The concept generally refers to [|computer] or [|information systems].  In software engineering the SDLC concept underpins many kinds of [|software development methodologies]. These methodologies form the framework for planning and controlling the creation of an information system the [|software development process]. Systems Development Life Cycle (SDLC) is a logical process used by a [|systems analyst] to develop an [|information system], including [|requirements] , [|validation] , [|training] , and user (stakeholder) ownership. Any SDLC should result in a high quality system that meets or exceeds customer expectations, reaches completion within time and cost estimates, works effectively and efficiently in the current and planned [|Information Technology] [|infrastructure], and is inexpensive to maintain and cost-effective to enhance.
 * Systems Development Life Cycle **

Computer systems are complex and often (especially with the recent rise of [|Service-Oriented Architecture] ) link multiple traditional systems potentially supplied by different software vendors. To manage this level of complexity, a number of SDLC models have been created: " [|waterfall] "; "fountain"; " [|spiral] "; "build and fix"; " [|rapid prototyping] "; " [|incremental] "; and "synchronize and stabilize

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