最新信息时代的信息系统--chap6教学讲义ppt.ppt

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1、信息时代的管理信息系统--Chap6STUDENTLEARNINGOUTCOMESDefinethetraditionalsystemsdevelopmentlifecycle(SDLC)anddescribethe7majorphaseswithinit.Compareandcontrastthevariouscomponent-baseddevelopmentmethodologies.DescribetheselfsourcingprocessasanalternativetothetraditionalSDLC.6-2STUDENTLEARNINGOU

2、TCOMESDiscusstheimportanceofprototypingandprototypingwithinanysystemsdevelopmentmethodologyDescribetheoutsourcingenvironmentandhowoutsourcingworks.6-3INTRODUCTIONInformationsystemsarethesupportstructureformeetingthecompany’sstrategiesandgoalsNewsystemsarecreatedbecauseemployeesreque

3、stthemNewsystemsarecreatedtoobtainacompetitiveadvantage6-7INTRODUCTIONWhendevelopinganewsystem,youhave3“who”choices…Insourcing–ITspecialistsinsideyourorganizationSelfsourcing–do-it-yourselfapproachmanyenduserstakewithlittleornohelpfromITspecialistsOutsourcing–athird-partyorganizatio

4、n(i.e.,letsomeonedotheworkandpaythemforit)6-8CHAPTERORGANIZATIONInsourcingandtheSDLCLearningoutcome#1Component-BasedDevelopmentLearningoutcome#2SelfsourcingLearningoutcome#3PrototypingLearningoutcome#4OutsourcingLearningoutcome#56-9INSOURCINGANDTHESDLCSystemsdevelopmentlifecycle(SDL

5、C)-astructuredstep-by-stepapproachfordevelopinginformationsystems7distinctphases,eachwithwell-definedactivitiesAlsocalledawaterfallmethodology,anapproachinwhicheachphaseoftheSDLCisfollowedbyanother,fromplanningthroughimplementation6-10SDLCPhases&MajorActivities6-11SDLCasaWaterfallMe

6、thodology6-12Phase1:PlanningPlanningphase-createasolidplanfordevelopingyourinformationsystemThreeprimaryplanningactivities:DefinethesystemtobedevelopedYoucan’tbuildeverysystem,soyoumakechoicesbasedonyourorganization’spriorities,whichmaybeexpressedascriticalsuccessfactorsCriticalsucc

7、essfactor(CSF)-afactorsimplycriticaltoyourorganization’ssuccess6-13Phase1:PlanningSettheprojectscopeProjectscope-clearlydefinesthehigh-levelsystemrequirementsScopecreep-occurswhenthescopeoftheprojectincreasesFeaturecreep-occurswhendevelopersaddextrafeaturesthatwerenotpartoftheinitia

8、lrequirementsProjec