UML第一章UML与面向对象讲义-PPT-教程课件.ppt

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1、Inthissession,youwilllearnto:IdentifythevarioussoftwaredevelopmentapproachesIdentifytheroleofOOADinSDLCObjectivesSDLCisadisciplinedandsystematicapproachthatdividesthesoftwaredevelopmentprocessintovariousphases,suchasrequirements,design,andcoding.Thephase-wisesoftwaredevelopmentprocessh

2、elpsyoutrackschedule,cost,andqualityofthesoftwareprojects.UnderstandingSoftwareDevelopmentLifeCycle(SDLC)TherearesixphasesofSDLC:FeasibilityanalysisRequirementanalysisandspecificationDesignCodingTestingMaintenanceOverviewofSDLCPhasesDifferenttypesofprojectshavedifferentrequirements.Iti

3、srequiredtotailortheSDLCphasestomeetthespecificneedsoftheproject.ThetailoringtheSDLCphases,givesrisetovarioussoftwaredevelopmentapproaches:WaterfallapproachPrototypingapproachSpiralapproachWin-winspiralapproachIncrementalapproachSoftwareDevelopmentApproachesDescribesthesoftwaredevelopm

4、entprocessinalinearsequentialflow.Istheearliestapproachusedforsoftwaredevelopment.Definesthesoftwaredevelopmentprocessinsevenphases:ConceptionInitiationAnalysisDesignConstructionIntegrationandtestingImplementationandmaintenanceWaterfallApproachThefollowingfigureshowsvariousphasesofthew

5、aterfallapproach:WaterfallApproach(Contd.)Alsoknownasevolutionaryapproach.Isasampleimplementationofthesystemthatshowslimitedandmainfunctionalcapabilitiesoftheproposedsystem.Isusedintherequirementsgatheringandanalysisphasetocapturetheexactrequirementoftheproposedsystem.PrototypingApproa

6、chVarioustypesofprototypes:ThrowawayprototypesEvolutionaryprototypesLimitationsofprototypingapproach:Givesclientsthefalseimpressionthatafewminorchangestotheprototypewillgivethemtherequiredsystem.Maycompromiseontheoverallqualityofthesoftwareintherushtodeveloptheprototype.PrototypingAppr

7、oach(Contd.)Includestheiterativenatureoftheprototypingapproachandthelinearnatureofthewaterfallapproach.Isidealfordevelopingsoftwarethatarereleasedinvariousversions.Thesixphasesofspiralapproachare:CustomercommunicationPlanningRiskanalysisEngineeringConstructionandreleaseCustomerevalua