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1、SixSigmaQualityTheDefinitionofTheTheory6Sigma(6o)istheGreekletterusedtodesignatetheestimatedstandarddeviationorvariationinaprocess.Thistheoryisakindofqualitymanagementaimedatpursuingzeroofdefectproductionandimprovingcustomersatisfaction.6amanagementtheorynotonlyfocusesonthe
2、qualityofproductionandservice,butalsoconcernedabouttheprocessofimprovement.60isatarget,thislevelofqualitymeansthatinalloftheprocessesandresults,99.99966%isnotdefective・Thatis,lessthan3.4defectsormistakespermillion.ItisevolvedfromTotalQualityManagement(TQM)andbecomesthestati
3、sticaltoolstoanalyzethecausesofproductdefects.Thehigherthe“sigmaleveI”,thelowertheamountofvariation.)6aisthehighlystandardprocessofassistingcompaniesfocusondevelopingandprovidingthenearlyperfectproductsandservices.TheHistoryof6aThe6oconcept・asthequalitymanagementconcept,ori
4、ginallycameupanddevelopedbyBillSmith(Motorola.Inc,1986.)Itwasformedandputintopractice・Threeyearslater,theMotorolagotgreatsuccess:theproductfailureratedecreasedfrom6210permillion(about4a)to32permillion.(about5.5a).GeneralElectricCompanymakethehighlyeffectivestrategyintomanag
5、ementphilosophyandpractice,andeventuallyformthecorporateculture.Atpresent,6amanagementtheoryisspreadingfastamongindustriesandmanycompanies.Thecharactersof6aAsacontinuousmethodofqualityimprovement,6sigmatheoryhasitsspecialcharacters:1,HighlyfocusonthecustomerrequirementGothe
6、orycentersoncustomer,itpaysmuchattentionontheneedofcustomers.2,BasedonstatisticdataStatisticdataisanimportanttooltomeasure6a.Thenumbers,dataareusefulformakingdecisionsandsupervisingtheerrorrateofproduct.3,HighlyconcernaboutbusinessprocessesThetraditionalquantitymanagementju
7、stfocusontheresults,notseriouslydealwiththeProcessesareasimportantasresults.Aftersalesofserviceandrepaircausemorecostofcompaniesandwasteroftheavailableresources.4,NobordercooperationNobordercooperationisasecretofGEtobesuccess.6amanagementwidenstheOpportunitiesofcooperate,el
8、iminatesbarriersbetweenhighandlowerlevelsattheSameordifferentdepartments.Theadvant
