可行性与系统建议书

可行性分析与系统建议书

可行性分析可行性

(feasibility)可行性是一种评量，用来评估信息发展系统将对组织有何利益。可行性分析

(feasibilityanalysis)是评量可行性的一个过程。可行性的渐进式约束法(creepingcommitment)

表示可行性应该在整个生命周期中评估。可行性的四种测试操作可行性是一个解决方案在组织中运作时，令人满意程度的评量。它同时也是人们对此系统∕项目感想的评量。技术可行性是一个特定技术解决方案的实用性，以及技术上的资源与专业知识的可利用性之评量。时程可行性是项目的时间表合理程度的评量。经济可行性是项目或解决方案的成本效益之评量。建议的系统方案之成本备选系统表备选系统表(candidatesystemsmatrix)说明备选系统的相似与相异之处；但是，它不提供分析。备选系统表范例CharacteristicsPortionofSystemComputerizedBriefdescriptionofthatportionofthesystemthatwouldbecomputerizedinthiscandidate.BenefitsBriefdescriptionofthebusinessbenefitsthatwouldberealizedforthiscandidate.ServersandWorkstationsAdescriptionoftheserversandworkstationsneededtosupportthiscandidate.SoftwareToolsNeededSoftwaretoolsneededtodesignandbuildthecandidate(e.g.,databasemanagementsystem,emulators,operatingsystems,languages,etc.).Notgenerallyapplicableifapplicationssoftwarepackagesaretobepurchased.Candidate1COTSpackagePlatinumPlusfromEntertainmentSoftwareSolutionswouldbepurchasedandcustomizedtosatisfyMemberServicesrequiredfunctionality.Thissolutioncanbeimplementedquicklybecauseit’sapurchasedsolution.TechnicallyarchitecturedictatesPentiumIII,MSWindows2000classserversandworkstations(clients).MSVisualC++andMSAccessforcustomizationofpackagetoprovidereportwritingandintegration.Candidate2MemberServicesandwarehouseoperationsinrelationtoorderfulfillment.FullysupportsuserrequiredbusinessprocessesforSoundStageInc.Plusmoreefficientinteractionwithmemberaccounts.Sameascandidate1.MSVisualBasic5.0

SystemArchitect2001

InternetExplorerCandidate3Sameascandidate2.Sameascandidate2.Sameascandidate1.MSVisualBasic5.0SystemArchitect2001InternetExplorer(Continued)备选系统表范例(续)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)备选系统表范例(续)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)。用备选系统的分析和评等来补充说明备选系统。可行性分析表范例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:100AlthoughcurrenttechnicalstaffiscomfortablewithPowerbuilder,managementisconcernedwithrecentacquisitionofPowerbuilderbySybaseInc.

MSSQLServerisacurrentcompanyst