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AbstractMore than one thousand Software Development Life Cycles SDLCs were developed to define the phases and activities in projects Even though there has been a considerable amount of progress on software development tools techniques methodologies and life cycles still 68 of software development projects are unsuccessfulIn this study Flexible and Adaptive Life Cycle FALC Framework is introduced to manage the utilization of different life cycles in the projects in order to increase success rates The FALC Framework provides opportunities to combine different SDLCs andor suitable parts of them at appropriate phases and use them jointly according to the project characteristics and needs By combining various life cycles benefits of each can be reaped from them all Moreover the FALC framework can decrease development time costs of the projects and provide a paradigm shift on using different development life cycles parallel in different groups of the projectsKeywords Flexible and Adaptive Life Cycle Software Development Life Cycle SDLC FALC hybrid software life cycle model waterfall iterative incremental agile spiral prototypingIntroductionThere are many factors affecting a software projects success These include the capability and leadership of the project managers the skill of the software developers the availability of project management requirement management the computing environment the difficulty of the problem being solved the resources available and the software life cycle model being employed 1Only 32 projects were successful delivered on time on budget with required features and budgets according to a survey done in 2009 2 62 of IT projects fail to meet their schedule according to another research 3Standish Group identified that a formal methodology was used at 46 of successful projects compared to 30 of challenged and failed projects According to this research the use of formal methodology in a project can increase chance of success by about 16 46-30 4Jayaratna reported that over one thousand brand-named systems and software development methodologies were in use around the world in 1994 5Some Software Development Life Cycles
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