六西格玛_绿带教程_测量_量具研究

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1、GageStudies(测量系统分析)1ModuleObjectives(章节目的)•IntroductiontoGageCapability(介绍量具能力)•Resolution(分辨性)•Accuracy(准确性)•Precision(精确性)•CommonMetrics(共同矩阵)•AttributeGageStudies(Attribute量测分析)•Variable(Continuous)GageStudies(Variable量测分析)2EveryGoodGauge…(每一个好的量具)The3aspectsofagoodgauge…(好的量具三要素)•Re

2、solution(分辨性)•Bias(Accuracy)偏离性(准确性)•Precision(精确性)3Resolution(分辨性)•Resolution(分辨性)–Thesizeofthedatacategorywhenthetotalmeasurementsystemisconsidered(所有量测系统要考量数据的种类与大小)Gageswithinadequateresolutionareonlyusefulforindicatingconformanceornonconformance(不具分辨性的量具只对一致或不一致有用)4Accuracy–Bias(准

3、确性-偏离性)•Bias(偏离性)–Thedifferencebetweentheobservedaverageofmeasurementsandthemasteraverageofthesameparts–oftenreferredtoasAccuracy(同样备件实际真实平均值与量测平均值之差异—通常称为准确性)BiasReferenceValueObservedValue5Accuracy–Linearity(准确性-线性)•Linearity(线性)–Thedifferenceinthebiasvaluesofagagethroughtheexpectedra

4、ngeofthegage.(量具在预期测量范围内测量偏离值之间的差别)LargerBiasBiasReferenceValueObservedValueReferenceValueObservedValueLowerPartoftheRangeHigherPartoftheRange6Accuracy–Stability(准确性-稳定性)•Stability(稳定性)–Thevariationinthemeasurementsobtainedonthesamemasterpartwhenonecharacteristicismeasuredoveranextended

5、periodoftime.(同一部件在长时间不断测量所测量到的偏差)Xbar/RChartforGageA15UCL=4.6934Mean=3.5423LCL=2.391SampleMean211Subgroup123456783UCL=2.8962R=1.1251SampleRange0LCL=07Precision–Repeatability(精确性-重复性)•Repeatability(重复性)–thevariationinmeasurementsobtainedwithonegagewhenusedseveraltimesbyoneoperatorwhilem

6、easuringonecharacteristicononepart.(用一量具由同一人多次量测同一特性和同一部分的量测变化)Target8GageRepeatabilityPrecision–Reproducibility(精确性-再现性)•Reproducibility(再现性)–Thevariationintheaverageofthemeasurementsmadebydifferentoperatorsusingthesamegagewhenmeasuringonecharacteristicononepart.(由不同操作员使用同一量具量测同一特性,同一部

7、分的平均量测变化)OperatorAOperatorBOperatorC9AccuracyandPrecisionDemonstration(准确性和精确性的验证)Accurate?(准确?)Accurate?(准确?)Precise?(精确?)Precise?(精确?)10AccuracyandPrecisionDemonstration(准确性和精确性的验证)Accurate?(准确?)Precise?(精确?)CansomethingbeAccuratebutnotPrecise???(有些事可以准确但不精确???)11TypesofGages