system Development life cycle:

                                             system  development life cycle  is the traditional  methodology  used to develop maintain and replace information system. system development life cycle in the orderly set of activities conducted and plan for each development project. it contain  the several phare that marks the program of system analysis and design effort every information system development organization user slightly different life cycle model. the system development life cycle concept application to a range  of hardware and software configuration as a system can be composed of hardware only software only or a combination of both.the SDLC also referred to an the application development life cycle. the different phares  in SDLC are show in following figure.



         

fig:system development life cycle