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1、附件三：您需要多少人来支持SAP项目？众所周知，实施R/3费用很高，但是长期支持费用有多少？请用下文中Gartner的"rulesofthumb"来算一下，如果采用SAP系统你需要多少人来支持？与您原来估算的差距有多大？同高昂的长期支持费用相比，初期实施费用根本算不了什么！原文："ManagingEnterpriseApplications:FromPackagesToProductivity",GartnerGroupEuropeSymposiumproceedings,Cannes,France,No
2、vember2-5,1998,FredMagee资料来源：TodeveloparoughestimateforthesizeofanERPimplementationstaff,usefivepersonmonthsperconcurrentuserandnormalizebasedonestimatedprojectlength.SAPImplementationStaff%ByRoleRolesAvg%Range%ESPAvg%WhenUsedTraining---Methodology31-1220
3、TechnicalArchitecture71-2747GapAnalysis30-1428ModuleConfiguration6140-8224Interfaces70-3542CustomExtensions50-2138DataConversion60-1841Testing/QA84-1922TotalStaffSize"Coarse"RuleofThumb:5Person-MonthsperConcurrentUserSource:GartnerMeasurementSelectedBench
4、markData[Note:ESP=EnterpriseServiceProviders,egBigSix'sandlargeSI's]Thereisno"correct"sizeforanERPimplementationteam,therearesimplytoomanyvariablesinvolved.However,havingsaidthatsomedataisbetterthannone.UsingtwelveselectedGartnerMeasurementSAPbenchmarks,t
5、hevariabilityinstaffingquicklybecomesapparent.Coreimplementationteamsizesrangedfrom24to161withimplementationelapsedtimesrangingfrom10to48months.Noobviousmeaningfulcorrelationwaspresentinthedata,e.g.numberofmodules,numberofinstances,degreeofcustomizationor
6、numberofinterfaces.However,lookingbackattheimplementationusingoperationalconcurrentusersasametric,acorrelationwasfound.A"coarse"ruleofthumbis5personmonthsperconcurrentuser.Estimationsofprojectdurationandconcurrentuserswouldleadtoanoverallestimateforstaffs
7、ize.Aroughapproximationforconcurrentuserswouldbe1:6namedusers.Forthe8staffrolesmeasured,thedataindicatesawiderangeofusage,withconfigurationdominatingshareofstaff.ApproximatelyhalfthecasesusedESPforcertainrolesandwhentheydidtheaveragesindicatedsignificantp
8、ortionsofworkbeingoutsourced.(...)Staffingsizesvarywidelybyorganization,butcanbecorrelatedtotwokeyparameters,concurrentusersandtheindustrystandardUnixmetricSPECmark92benchmark.SAPSupportStaffEFTMetricsApplicationAvg
