Manyoftheactivitiesperformedduringthepreliminaryinvestigationarestillbeingconductedin(),butinmuchgreaterdepththanbefore.Duringthisphase,theanalystmustbecomefullyawareofthe()andmustdevelopenoughknowledgeaboutthe()andtheexistingsystemstoenableaneffectivesolutiontobeproposedandimplemented.Besidesthe()forprocessanddataofcurrentsystem,thedeliverablefromthisphasealsoincludesthe(5)fortheproposedsystem. (5)应选()
A.hardware and software specification B.system performance specification C.formal requirements definition D.general problem statement正确答案C
