MeasurementSystemsAnalysis(测量系统分析)

Presentation1MeasurementSystemsAnalysis测量系统分析WarmupExercise热身练习TheNecessityofTrainingFarmHandsforFirstClassFarmsintheFatherlyHandlingofFarmLiveStockisForemostintheEyesofFarmOwners.SincetheForefathersoftheFarmOwnersTrainedtheFarmHandsforFirstClassFarmsintheFatherlyHandlingofFarmLiveStock,theFarmOwnersFeeltheyshouldcarryonwiththeFamilyTraditionofTrainingFarmHandsofFirstClassFarmersintheFatherlyHandlingofFarmLiveStockBecausetheyBelieveitistheBasisofGoodFundamentalFarmManagement.Task:Youhave60secondstocountthenumberoftimesthe6thletterofthealphabetappearsattherightparagraph.Areyouready?Go!给你60秒的时间数出右边段落中第六个字母的出现次数.WarmupExerciseDocumentyouransweronascrapnoteAswereadtheanswers,typethemintoaMinitabdatasheet.RunahistogramontheresultsWhatareyourobservations?ObservedVariationWhichprocessisbest?Observed(Total)2TotalVariability(Observedvariability)ProcessAProcessBMeasurementVariationWhichprocessisbest?=Meas.System2Observed(Total)2MeasurementVariabilityTotalVariability(Observedvariability)ProcessAProcessBPartVariationWhichprocessisbest?+Actual(Part)2=PartVariability(Actualvariability)Meas.System2Observed(Total)2ProcessAProcessBTotalVariability(Observedvariability)MeasurementVariabilityLSLUSLGoodPartsRejected?MeasurementUncertaintyWhatIsAnMSA?Scientificandobjectivemethodofanalyzingthevalidityofameasurementsystem一种科学客观的方法，用于有效的分析测量系统–A“tool”whichquantifies:一种工具，它量化：1.EquipmentVariation设备波动2.Appraiser(Operator)Variation评估者波动3.TheTotalVariationofaMeasurementSystem测量系统总的波动–MSAisNOTjustCalibration测量系统分析不仅仅是校准MeasurementSystemAnalysisisoftena“projectwithinaproject”测量系统分析经常是”项目中的项目”MainSourcesOfVariationMaterials材料Methods方法Machines机器People人员Environment环境Measures测量Measurementsystemsarethemostneglected测量系统经常被忽视测量系统：是用来对被测特性定量测量或定性评价的仪器或量具、标准、操作、方法、夹具、软件、人员、环境和假设的集合；用来获得测量结果的整个过程。(MSA手册第三版定义)MeasurementSystemAsAProcessCleanlinessTemperatureDimensionWeightCorrosionHardnessConductivityDensitySequenceTimingPositioningLocationSet-upPreparationCleanlinessTemperatureDesignPrecisionCalibrationResolutionStabilityWearCleanlinessVibrationAtmosphericpressureLightingTemperatureHumidityCompliance-procedureFatigueAttentionCalculationerrorInterpretationSpeedCoordinationVisionKnowledge-instrumentDexterityPeopleEnvironmentMeasurementErrorMethodMaterialMachineComponentsOfMeasurementErrorResolution/Discrimination分辨率Accuracy(biaseffects)准确度（偏离）Linearity线性Stability(consistency)稳定性（一致性）Repeatability(Precision)重复性（精度）Reproducibility(Precision)再现性（精度）Eachcomponentofmeasurementerrorcancontributetovariation,causingwrongdecisionstobemade测量误差的每一项都可能对变差造成影响而使我们做出错误的决策CategoriesOfMeasurementErrorWhichAffectLocation影响位置的测量误差Accuracy/BiasLinearityStabilityCategoriesOfMeasurementErrorWhichAffectSpread影响分布的测量误差RepeatabilityReproducibilityPrecisionResolution/Discrimination分辨率Canchangebedetected?能侦测到改变吗？Resolution?Accuracy/Bias?Linearity?Stability?Precision(R&R)?OKOKOKOKResolutionDefinitions分辨率定义Resolution/Discrimination分辨率–Capabilitytodetectthesmallesttolerablechanges可以侦测最小变化的能力InadequateMeasurementUnits不充分的度量单位–Measurementunitstoolargetodetectvariationpresent度量单位过大而不能侦测到变化Guideline:“10BucketRule”1/10原则–Incrementsinthemeasurementsystemshouldbeone-tenththeproductspecificationorprocessvariation测量系统必须精确到产品范围或过程变差的1/10Sameprocessoutputbeingmeasured12345BetterDiscrimination12345PoorDiscrimination1.31Resolution/Discrimination分辨率Resolution分辨率OnHoldcomplaintsperhour每小时的投诉ComplaintNumberTransfers50Disputes210Information143Other12Total415Whatisthecustomer’sbiggestcomplaint?OnHoldcomplaintsperhourComplaintNumberTransfers50SetuporMaintenanceDisputes70ServiceReceivedDisputes60BillingAmountDisputes80UpdateAccountInformation115RequestInformation28Other12•Total415Whatisthecustomer’sbiggestcomplaint?ResolutionAccuracy/Bias准确性/偏离Measurementsare“shifted”from“true”value测量值偏离真值Resolution?Accuracy/Bias?Linearity?Stability?Precision(R&R)?OKOKOKOKDifferencebetweentheobservedaveragevalueofmeasurementsandthemastervalue测量平均值与基准值之间的差异MasterValue(ReferenceStandard)AverageValueMastervalueisanaccepted,traceablereferencestandard基准值是公认的标准值Accuracy/Bias准确性/偏离xxxxxxxxxxxxxxxxxxLessaccurateMoreaccurateAccuracy/Bias准确性/偏离Linearity线性Measurementisnot“true”and/orconsistentacrosstherangeofthe“gage”测量系统在测量范围内与仪器范围的不一致性Resolution?Accuracy/Bias?Linearity?Stability?Precision(R&R)?OKOKOKOKLinearityFullRangeofGageReferenceValueNoBiasObservedAverageValueBiasLinearity-AttributeExampleSurveyscoring:__SuperOutstanding!10__Outstanding!9__Incredible8__Excellent7__Great6__VeryGood5__Good4__OK3__Fair2__Poor1Isthisafairscale?Stability稳定性Measurementdrifts测量系统偏移Resolution?Accuracy/Bias?Linearity?Stability?Precision(R&R)?OKOKOKOKStability稳定性Measurementsremainconstantandpredictableovertime测量系统随时间保持一致性与可预见性–Forbothmeanandstandarddeviation含均值与标准偏差Evaluatedusingcontrolcharts可用控制图来检查Time2Time1MasterValue(ReferenceStandard)Precision精确性RepeatabilityandReproducibility重复性与再现性Resolution?Accuracy/Bias?Linearity?Stability?Precision(R&R)?OKOKOKOKPrecision精确性2total=2product/process+2repeatability+2reproduc