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【正文】 idential 6σ推行教材Statistical Definition of nSigmaLSL USLProcess Width?oDesign WidthTscaleLSL USLscaleT+n?scale n ?This is the socalled nsigma Sigma is a statistical unit of measure that reflects process capability. The sigma scale of measure is perfectly correlated to such characteristics as defectsperunit, partsper million defective, and the probability of a failure/error. 20BPTL Confidential 6σ推行教材Statistical Definition of 6σThis is the six sigma we said LSL USLProcess Width?oDesign Width 3?st + 3?stT.001 ppm ppm LSLscaleLSL USLscaleT+ 6?stscale 6?st21BPTL Confidential 6σ推行教材3 Sigma 6 Sigma5 Sigma4 Sigma % % % %HistoricalCurrentIntermediateLongRunSigma LongTerm Yield Standard6σ Performance Target22BPTL Confidential 6σ推行教材l Characterizel Optimizel BreakthroughUSLTLSLUSLTLSLTUSLLSLUSL’LSL’The Strategy23BPTL Confidential 6σ推行教材BreakthroughStrategyCharacterizationPhase 1:MeasurementPhase 2:AnalysisOptimizationPhase 3:ImprovementPhase 4:ControlThe Breakthrough Phases24BPTL Confidential 6σ推行教材Phase 2:AnalysisCapability study ( Cpk)GR R study Causeeffect analysisFishbone and CE matrix Dot plot , Box plot, Histogram chart, Pareto chart The Breakthrough Phases Analysis tool and method25BPTL Confidential 6σ推行教材ImprovementAnalysis rolled throughput yield Set up process Map Set up FMEA and control………….The Breakthrough Phases Improvement tool and method26BPTL Confidential工 序 能 力 分 析Dec 18 ,202327BPTL Confidential 6σ推行教材學 習 目 標4 工序控制與工序能力4 工序能力 :– 規(guī)格 , 工藝和控制的界限– 工序潛力與工序表現(xiàn)4 短期與長期工序能力4 “6σ ” 品質(zhì)28BPTL Confidential 6σ推行教材工序控制與工序能力1. 工序控制216。 ? = ? = + 165。%%%? +/ 3? is often referred to as the width of a normal distribution3正態(tài)分布的一些特性11BPTL Confidential 6σ推行教材Let’s pute the cumulative probabilities of the following distributions:+ 165。 165。)A~Normal(?A,?A178。 Variance (?2)正態(tài)分布的一些特性Distribution OneDistribution TwoDistribution ThreeWhat is the difference between the 3 normal distributions?X ~ N(?, ?2)18BPTL Confidential 6σ推行教材A~Normal(?A,?A178。 Mean (?)216。)B~Normal(?B,?B178。+ 165。 165。 165。 Probability Distributions 240。 過程的跟蹤表現(xiàn)來証實它是否建立了長時間穩(wěn)定的數(shù)據(jù)分布表現(xiàn) ,典型地 , 用帶有 “僅從工序中的數(shù)據(jù)計算出的 ”控制圖表 . 216。 度量一個穩(wěn)定的工序狀態(tài) (受控制 )在多大程度上能滿足客戶的規(guī)格 .30BPTL Confidential 6σ推行教材變化的類型固有的或定值的變化4許多微小又不可避免的原因?qū)е碌睦鄯e效果4只有微小的機會導致變化的運作工序稱為 “統(tǒng)計控制 ” 31BPTL Confidential 6σ推行教材變化的類型特定或確定的變化4 可能由于 a) 不正確的調(diào)機 b) 操作者錯誤 c) 有缺陷的原材料4 一個工序如果出現(xiàn)上面的變化則稱為 “失控 ” .32BPTL Confidential 6σ推行教材工序能力工序能力 研究能 : 4顯示工序輸出的恒定性4顯示輸出符合規(guī)格的程度4用于和另一工序或競爭對手比較33BPTL Confidential 6σ推行教材工序能力與規(guī)格極限a) b)c)a) 工序能力高b)工序能力能夠滿足c)工序能力不足夠34BPTL Confidential 6σ推行教材三種極限類型 規(guī)格極限
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