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1、SystemsAnalysisandDesigninaChangingWorld,FourthEditionLearningObjectivesExplainthepurposeandvariousphasesofthesystemsdevelopmentlifecycle(SDLC)ExplainwhentouseanadaptiveapproachtotheSDLCinplaceofamorepredictivetraditionalSDLCExplainthedifferencesbetweenamodel,atool,atechnique,andame
2、thodologyDescribethetwooverallapproachesusedtodevelopinformationsystems:thetraditionalmethodandtheobject-orientedmethod2SystemsAnalysisandDesigninaChangingWorld,4thEditionLearningObjectives(continued)Describesomeofthevariationsofthesystemsdevelopmentlifecycle(SDLC)Describethekeyfeat
3、uresofcurrenttrendsinsystemsdevelopment:theUnifiedProcess(UP),ExtremeProgramming(XP),AgileModeling,andScrumExplainhowautomatedtoolsareusedinsystemdevelopment敏捷建模3SystemsAnalysisandDesigninaChangingWorld,4thEditionOverviewSystemdevelopmentprojectPlannedundertakingwithfixedbeginningan
4、dendProducesdesiredresultorproductCanbealargejobwiththousandsofhoursofeffortorasmallone-monthprojectSuccessfuldevelopmentprojectProvidesadetailedplantofollowOrganized,methodicalsequenceoftasksandactivitiesProducesreliable,robust,andefficientsystem4SystemsAnalysisandDesigninaChanging
5、World,4thEditionTheSystemsDevelopmentLifecycle(SDLC)Systemsdevelopmentlifecycle(SDLC)ProvidesoverallframeworkformanagingsystemsdevelopmentprocessTwomainapproachestoSDLCPredictiveapproach–assumesprojectcanbeplannedoutinadvanceAdaptiveapproach–moreflexible,assumesprojectcannotbeplanne
6、doutinadvanceAllprojectsusesomevariationofSDLC5SystemsAnalysisandDesigninaChangingWorld,4thEditionChoosingthePredictivevs.AdaptiveApproachtotheSDLC(Figure2-1)6SystemsAnalysisandDesigninaChangingWorld,4thEditionTraditionalPredictiveApproachtotheSDLCProjectplanning–initiate,ensurefeas
7、ibility,planschedule,obtainapprovalforprojectAnalysis–understandbusinessneedsandprocessingrequirementsDesign–definesolutionsystembasedonrequirementsandanalysisdecisionsImplementation–construct,test,trainusers,andinstallnewsystemSupport–keepsystemrunningandimprove理解待解决的业务及定义业务需求开发程序结
8、构和算法7SystemsAnalysi
