信息时代的管理信息系统Chap006课件.ppt
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- 信息时代 管理信息系统 Chap006 课件
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1、Chapter 6Systems Development:Phases,Tools,and TechniquesINTRODUCTIONWhen developing a new system,you have 3“who”choices1.Insourcing IT specialists inside your organization2.Selfsourcing do-it-yourself approach many end users take with little or no help from IT specialists3.Outsourcing a third-party
2、organization(i.e.,let someone do the work and pay them for it)INSOURCING AND THE SDLCSystems development life cycle(SDLC)-a structured step-by-step approach for developing information systems 7 distinct phasesAlso called a waterfall methodology,an approach in which each phase of the SDLC is followed
3、 by another,from planning through implementationSDLC Phases&Major ActivitiesCOMPONENT-BASED DEVELOPMENTThe SDLC focuses only on the project at handComponent-based development(CBD)focuses on building small self-contained blocks of code(components)that can be reused across a variety of applications1.U
4、sing already-developed components2.Building new components as neededRAD and Extreme Programming SELFSOURCINGSelfsourcing(end-user development)the development and support of IT systems by end users with little or no help from IT specialistsDo-it-yourself systems development approachCan relieve IT spe
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