不良率管制图的管制界限ppt课件.ppt

不良率管制图的管制界限ppt课件.ppt

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时间:2020-09-30

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1、統計製程管制與製程能力分析9StrategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsStatisticalThinkingAllworkoccursinasystemofinterconnectedprocessesAllprocesshavevariation(Theamount…tendstobeunderestimated)Understandingvariationandreducingvariationareim

2、portantkeystosuccessStrategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsWhydostatisticssometimesfailintheworkplace?LackofknowledgeaboutthetoolsGeneraldisdainforallthingsmathematicalCulturalbarriersinacompanyStatisticalspecialistshavetrou

3、blecommunicatingStrategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsWhydostatisticssometimesfailintheworkplace?Statisticsgenerallyarepoorlytaught,emphasizingmathematicaldevelopmentratherthanapplicationPeoplehaveapoorunderstandingofthesci

4、entificmethodStrategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsWhydostatisticssometimesfailintheworkplace?Organizationslackpatienceincollectingdata.Alldecisionshavetobemade“yesterday”Statisticsareviewedassomethingtobuttressanalready-he

5、ldopinionPeoplefearusingstatisticsStrategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsWhydostatisticssometimesfailintheworkplace?Mostpeopledon’tunderstandrandomvariationStatisticaltoolsoftenarereactiveandfocusoneffectsratherthancausesStr

6、ategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsTypeIandTypeIIErrorsTypeIerrorProducersriskProbabilitythatagoodproductwillberejectedTypeIIerrorConsumersriskProbabilitythatanonconformingproductwillbeavailableforsaleStrategicQualityPlanni

7、ngStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsUnderstandingProcessVariationRandomvariationCenteredaroundthemeanConsistentamountofdispersionStrategicQualityPlanningStatistically-BasedQualityImprovementforVariablesStatisticalFundamentalsUnderstandingProce

8、ssVariationNonrandomvariation“Spe

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