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可行性分析與系統建議書AlexLai可行性分析可行性(feasibility)可行性是一種評量，用來評估資訊發展系統將對組織有何利益。可行性分析(feasibilityanalysis)是評量可行性的一個過程。可行性的漸進式約束法(creepingcommitment)表示可行性應該在整個生命週期中評估。可行性的四種測試操作可行性是一個解決方案在組織中運作時，令人滿意程度的評量。它同時也是人們對此系統∕專案感想的評量。技術可行性是一個特定技術解決方案的實用性，以及技術上的資源與專業知識的可利用性之評量。時程可行性是專案的時間表合理程度的評量。經濟可行性是專案或解決方案的成本效益之評量。建議的系統方案之成本備選系統表備選系統表(candidatesystemsmatrix)說明備選系統的相似與相異之處；但是，它不提供分析。備選系統表範例CharacteristicsPortionofSystemComputerizedBriefdescriptionofthatportionofthesystemthatwouldbecomputerizedinthiscandidate.BenefitsBriefdescriptionofthebusinessbenefitsthatwouldberealizedforthiscandidate.ServersandWorkstationsAdescriptionoftheserversandworkstationsneededtosupportthiscandidate.SoftwareToolsNeededSoftwaretoolsneededtodesignandbuildthecandidate(e.g.,databasemanagementsystem,emulators,operatingsystems,languages,etc.).Notgenerallyapplicableifapplicationssoftwarepackagesaretobepurchased.Candidate1COTSpackagePlatinumPlusfromEntertainmentSoftwareSolutionswouldbepurchasedandcustomizedtosatisfyMemberServicesrequiredfunctionality.Thissolutioncanbeimplementedquicklybecauseit’sapurchasedsolution.TechnicallyarchitecturedictatesPentiumIII,MSWindows2000classserversandworkstations(clients).MSVisualC++andMSAccessforcustomizationofpackagetoprovidereportwritingandintegration.Candidate2MemberServicesandwarehouseoperationsinrelationtoorderfulfillment.FullysupportsuserrequiredbusinessprocessesforSoundStageInc.Plusmoreefficientinteractionwithmemberaccounts.Sameascandidate1.MSVisualBasic5.0SystemArchitect2001InternetExplorerCandidate3Sameascandidate2.Sameascandidate2.Sameascandidate1.MSVisualBasic5.0SystemArchitect2001InternetExplorer(Continued)備選系統表範例(續)CharacteristicsApplicationSoftwareAdescriptionofthesoftwaretobepurchased,built,accessed,orsomecombinationofthesetechniques.MethodofDataProcessingGenerallysomecombinationof:on-line,batch,deferredbatch,remotebatch,andreal-time.OutputDevicesandImplicationsAdescriptionofoutputdevicesthatwouldbeused,specialoutputrequirements,(e.g.,network,preprintedforms,etc.),andoutputconsiderations(e.g.,timingconstratints)Candidate1PackagesolutionClient/Server(2)HP4MVdepartmentlaserprinters(2)HP5SILANlaserprintersCandidate2CustomsolutionSameascandidate1.(2)HP4MVdepartmentlaserprinters.(2)HP5SILANlaserprinters(1)PRINTRONIXbar-codeprinter(includessoftware&drivers)WebpagesmustbedesignedtoVGAresolution.AllinternalscreenswillbedesignedforSVGAresolution.Candidate3Sameascandidate2.Sameascandidate1.Sameascandidate2.(Continued)備選系統表範例(續)CharacteristicsInputdevicesandImplicationsAdescriptionofinputmethodstobeused,inputdevices(e.g.,keyboard,mouse,etc.),specialinputrequirements(e.g.,neworrevisedformsfromwhichdatawouldbeinput),andinputconsiderations(e.g.,timingofactualinputs).StorageDevicesandImplicationsBriefdescriptionofwhatdatawouldbestored,whatdatawouldbeaccessedfromexistingstores,whatstoragemediawouldbeused,howmuchstoragecapacitywouldbeneeded,andhowdatawouldbeorganized.Candidate1Keyboard&mouse.MSSQLServerDBMSwith1000GBarrayedcapability.Candidate2Apple“QuickTake”digitalcameraandsoftware(15)PSCQuickscanlaserbar-codescanners(1)HPScanjet4CFlatbedScannerKeyboardandmouseSameascandidate1.Candidate3Sameascandidate2.Sameascandidate1.可行性分析表可行性分析表(feasibilityanalysismatrix)。用備選系統的分析和評等來補充說明備選系統。可行性分析表範例FeasibilityCriteriaOperationalFeasibilityFunctionality.Adescriptionoftowhatdegreethecandidatewouldbenefittheorganizationandhowwellthesystemwouldwork.Political.Adescriptionofhowwellreceivedthissolutionwouldbefrombothusermanagement,user,andorganizationperspective.TechnicalFeaasibilityTechnology.Anassessmentofthematurity,availability(orabilitytoacquire),anddesirabilityofthecomputertechnologyneededtosupportthiscandidate.Expertise.Anassessmentofthetechnicalexpertiseneededtodevelop,operate,andmaintainthecandidatesystem.EconomicFeasibilityCosttodevelop:Paybackperiod(discounted):Netpresentvalue:Detailedcalculations:ScheduleFeasibilityAnassessmentofhowlongthesolutionwilltaketodesignandimplement.RankingCandidate1OnlysupportsMemberServicesrequirementsandcurrentbusinessprocesseswouldhavetobemodifiedtotakeadvantageofsoftwarefunctionality.Score:60CurrentproductionreleaseofPlatinumPluspackageisversion1.0andhasonlybeenonthemarketfor6weeks.Maturityofproductisariskandcompanychargesanadditionalmonthlyfeefortechnicalsupport.RequiredtohireortrainC++expertisetoperformmodificationsforintegrationrequirements.Score:50Approximately$350,000.Approximately4.5years.Approximately$210,000.SeeAttachmentA.Score:60Lessthan3months.Score:9560.5Candidate2Fullysupportsuserrequiredfunctionality.Score:100AlthoughcurrenttechnicalstaffhasonlyPowerbuilderexperience,thesenioranalystswhosawtheMSVisualBasicdemonstrationandpresentationhaveagreedthetransitionwillbesimpleandfindingexperiencedVBprogrammerswillbeeasierthanfindingPowerbuilderprogrammersandatamuchcheapercost.MSVisualBasicisamaturetechnologybasedonversionnumber.Score:95Approximately$418,040.Approximately3.5years.Approximately$306,748.SeeAttachmentA.Score:859-12months.Score:8092Candidate3Sameascandidate2.Score:100Althoughcurre