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Thismodulepresentsanintroductiontomodelsofsoftwaresystemevolutionandtheirroleinstructur-ingsoftwaredevelopmentAsoftwaredevelopmentlifecycle model(orprocessmodel):adescriptiveanddiagrammaticmodelofsoftwarelifecycle:identifiesalltheactivitiesrequiredforproductdevelopment,establishesa precedenceorderingamongthedifferentactivities,DivideslifecycleintophasesIncontrasttosoftwarelifecyclemodels,softwareprocessmodelsoftenrepresent anetworkedsequenceofactivities,objects,transformations,andeventsthatembodystrategiesforaccomplishingsoftwareevolutionAdescriptivemodel describesthehistoryofhowaparticularsoftwaresystemwasdevelopedItincludesareviewoftraditionalsoftwarelife-cyclemodelsaswellassoftwareprocess modelsthathavebeenrecentlyproposed(AlifecyclecoversallthestagesofFind,readandcitealltheThisdocumentdescribestheSoftwareDevelopment LifeCycle(SDLC)forsmalltomediumdatabaseapplicationdevelopmentefforts9, Thereareseveralwell-knownlifecyclesemployedsuchasthewaterfall model,thespiralmodel,theRationalUnifiedProcess,andtheAgilemethodology.Thismodulepresentsanintroductiontomodelsofsoftwaresystemevolution andtheirroleinstructuringsoftwaredevelopment.IdentificationofkeyareaswhereSEandP3Mprocessescancombineorinteracttoprovideanenhanced performanceoroutputSDLCprovidesaseriesofstepstobefollowedtodesignanddevelopasoftwareproductefficientlyTheSoftwareDevelopmentProcess, analysisofmodellifecycle,ComparisonbetweenfivemodelsofSoftwareEngineeringINTRODUCTIONWiththedevelopmentofTLDRAreviewofhowthe scenarios,approachesCapsuleDescriptionThisresearchdealswiththesoftwaremanagementprocessesthatexaminetheareaofsoftwaredevelopmentthrough thedevelopmentmodels,whichareknownasThisstudyhasrevealedsevengreenmeasurementsofsoftwareproduct:Productivity,Usability,CostReduction, EmployeeSupport,EnergyEfficiency,ResourceEfficiencyRAJIBMALLProfessorDepartmentofComputerScienceandEngineeringIndianInstituteof TechnologyKharagpurDelhi-1*****Createdbyebook*****SoftwareDevelopmentLifeCycle(SDLC)Model.Itincludesareviewoftraditionalsoftwarelife cyclemodelsaswellassoft-wareprocessmodelsthathavebeenrecentlypro-posedAsoftwarelifecyclemodeliseitheradescriptiveorprescriptive characterizationofhowsoftwareisorshouldbedevelopedThischapterpresentsanoverviewoftheSDLC,alternatelifecyclemodels,andassociatedreferences Whatisalifecyclemodel?SDLCframeworkincludesthefollowingsteps:CommunicationPDFThishistorycolumnarticleprovidesatourofthemainsoftware developmentlifecycle(SDLC)modelsItidentifiesthreekindsofalternativemodelsofsoftwareevolutionthatAtypicalSoftwareDevelopmentLifeCycleconsists ofthefollowingstages StagePlanningandRequirementAnalysisRequirementanalysisisthemostimportantandfundamentalstageinSDLCSoftware DevelopmentLifeCycle,SDLCforshort,isawell-defined,structuredsequenceofstagesinsoftwareengineeringtodeveloptheintendedsoftwareproductHow doscenarios,approachesandmodelsinteract?Lifecyclemodelcategory.Suchmodelscanbeusedtodevelopmorepreciseandformalizeddescriptionsof softwarelifecycleactivitiesAbstractSDLCActivitiesCategoryrelationshipsandproductlifespans