Arequirementissimplyastatementofwhatthesystemmustdoorwhatcharacteristicsitneedstohave.Requirementswrittenfromtheperspectiveofuserandfocusonuserneedsarecalled__(71)__.Requirementswrittenfromthedeveloper'sperspectiveanddescribehowthesystemwillbeimplementedarecalled__(72)__.Requirementsevolvefromdetailedstatemensofbusinesscapabilitiesthatasystemshouldhavetodetailedstatementsofthetechnicalwayinwhickthecapabilitieswillbeimplementedinthenewsystem.Requirementscanbeeitherfunctionalornofunctionalinnature.Forexample,duringtheanalysisphaseoftravelvehiclessalessystem,thesystemthatmusthavetheabilitytosearchforavailableinventoryis__(73)__.TherequirementthatthesystemshouldbeabletoworkonanyWebbrowserbelongsto__(74)__.ThatcustomerpersonalinformationisprotectedincompliancewiththeDataProtectionActisarequirementof__(75)__. (72)应选？
A.operational requirements B.business requirements C.technical requirements D.system requirements正确答案D
