Lecture2.ppt

《Lecture2.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Chapter4INCEPTIONISNOTTHEREQUIREMENTSPHASEObjectivesDefinetheinceptionstep.Motivatethefollowingchaptersinthissection.“Thebestistheenemyofthegood.”-Voltaire1InceptionisNOTtheRequirementsPhasePurposeistodecidewhethertoproceedwithdevelopment,nottodefinerequirements.Onlyke

2、yrequirementsareinvestigated.Dothestakeholdershavebasicagreementonthevisionoftheproject,andisitworthinvestinginseriousinvestigation?Inceptionistheinitialshortsteptoestablishacommonvisionandbasicscopefortheproject.Itwillincludeanalysisofperhaps10%ofusecases,analysisofthec

3、riticalnon-functionalrequirement,creationofabusinesscase,andpreparationofthedevelopmentenvironment.Inceptioninonesentence:Determinetheproductscope,vision,andbusinesscase.2QuestionsduringinceptionWhatisthevisionforthisproject?Whatisthebusinesscase?Istheprojectfeasible?Sho

4、uldwebuyorbuild?Roughestimateofcost?Atendofinception:GoorNoGo?AnAnalogy:Newfieldexplorationdecisionintheoilbusiness.3InceptionArtifactsVisionandBusinessCaseUse-CaseModelSupplementarySpecificationGlossaryPrototypesandproof-of-conceptsRiskList&RiskManagementPlanIterationPl

5、anPhasePlanandSoftwareDevelopmentPlanDevelopmentCase*Notalldocumentsareneededforeveryproject.ProjectMgr’sresponsibility4VisionandBusinessCaseDescribesthehighlevelgoalsandconstraints,thebusinesscase,andprovidesanexecutivesummary.Usuallyhasanestimateofcosts(+/-100%)andexpe

6、ctedbenefitsstatedinfinancialterms.5UseCaseModelDescribesthefunctionalrequirementsandrelatednon-functionalrequirements.Asetoftypicalscenariosofusingasystem.Preliminaryonly,usuallythenamesofmostoftheexpectedusecasesandactors,butusuallyonlyabout10%oftheusecasesaredetailed.

7、Donotdetailalloftheusecases.Onlydocumentthemostimportantones.About10%oftheusecasesshouldbedetailedenoughtoestimatethescopeofthetotalproject.6SupplementarySpecificationDescribesnon-functionalrequirementsthatdonotappearelsewhere.Functionalrequirementsdescribethefunctionali

8、tyoftheproduct.Allotherrequirementsthatmustbemetareconsiderednon-functionalrequirements.7GlossaryDescri