[精选]six sigma training(ppt 66)6sigma推行教材.pptx
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1、 Six-Sigma Six-Sigma Training BookTraining Book Dec 18,20011 BPTL Confidential4 數据分布2 BPTL Confidential4 NormalExponentialWeibullLognormaltc2fContinuous DistributionsSampling Distributions數据分布3 BPTL ConfidentialThe most widely used model for the distribution of continuous random variable.Arises in t
2、he study of numerous physical phenomena,such as the velocity of molecules.正態分布Plot is known as Probability Density Functionof X4 BPTL Confidential4 Many natural phenomena and man-made processes are observed to have normal distributions,or can be closely represented as normally distributed.4 For exam
3、ple,the length of a machined part is observed to vary about its mean due to:temperature drift,humidity change,vibrations,cutting angle variations,cutting tool wear,bearing wear,rotational speed variations,fixturing variations,raw material changes and contamination level changes4 If these sources of
4、variation are small,independent and equally likely to be positive or negative,the length will closely approximate a normal distribution.正態分布5 BPTL Confidential4 First introduced by French mathematician Abraham DeMoivre in 1733.4 Made famous in 1809 by German mathematician K.F.Gauss when he also deve
5、loped a normal distribution independently and used it in his study of astronomy.4 As a result,it is also known as the Gaussian distribution.4 During mid to late nineteenth century,many statisticians believed that it was“normal for most well-behaved data to follow this curve.正態分布-歷程表Karl Friedrich Ga
6、uss6 BPTL Confidential4 正態分布易于理解,具有特性,統計學提供了許多基于正態分布的強有力的分析方法來幫助人們做決定.4 因此,我們通常會試圖用正態分布去近似模擬其它分布 如可能 或轉化數据以“使它遵從正態分布.4 它是分析過程能力的首選分布形式.正態分布7 BPTL Confidential4 A normal distribution can be pletely described by knowing only the:Mean Variance 2正態分布的一些特性Distribution OneDistribution TwoDistribution Thre
7、eWhat is the difference between the 3 normal distributions?X N,218 BPTL ConfidentialANormal(A,A)BNormal(B,B)ANormal(A,A)BNormal(B,B)ANormal(A,A)BNormal(B,B)What is the difference between process A&B for each case?正態分布的一些特性9 BPTL Confidential4 The mean,median and mode all coincide at the same value-.
8、There is perfect symmetry.+-MeanMedianMode2The mean represents the arithmetic average of all observations in a data set.If a set of observations is arranged in an increasing order of magnitude ranked data,the middle value is called the median.l If the number of observations is odd,the median is the
9、value of the middle number.l If the number of observations is even,there are 2 middle numbers,and the median is the average of the 2 values.The mode is the observation that occurs most frequently in the sample.正態分布的一些特性10 BPTL Confidential4 The area under sections of the curve can be used to estimat
10、e the cumulative probability of a certain“event occurring:Point of Inflection1+-68.27%95.45%99.73%+/-3 is often referred to as the width of a normal distribution3正態分布的一些特性11 BPTL ConfidentialLets pute the cumulative probabilities of the following distributions:+-m=3.5s=0.61.8+-20.0=16.6=2.8+-m=-1.5s
11、=0.9-2.80.5正態分布的一些特性12 BPTL ConfidentialMiniTab:Calc Probability Distributions Normal.Enter valueEnter s valueEnter x value正態分布的一些特性13 BPTL Confidential什么是 6?14 BPTL Confidential6 簡介15 BPTL ConfidentialThe Focus of Six Sigma4 Identifying critical aspects of the business with problems or opportunitie
12、s for improvement.4 Targeting those critical areas and designating improvement efforts as Six Sigma Black Belt projects.4 Selecting top people to work on the projects-full time.4 Ensuring these people have the time,tools,and resources they need to succeed.16 BPTL ConfidentialCustomer Focus:A Model F
13、or SuccessTechnology TechnologyCapabilityCapabilityOrganizationOrganizationPeoplePeopleProcessesProcesses 商務上的生存競爭有賴于我們多大程度上讓我們的客戶滿意.客戶滿意才能体現品質,价格,和貨期的意義.品質,成本,准時走貨無不依耐于工序能力.What purpose is Six-sigma?17 BPTL ConfidentialSix Sigma VisionThe Vision of Six Sigma is to delight customers by delivering wo
14、rld-class quality products through the achievement of Six Sigma levels of performance in everything we do.What purpose is Six-sigma?Six Sigma PhilosophyThe philosophy of Six Sigma is to apply a structured,systematic approach to achieve breakthrough improvement across all areas of our business.18 BPT
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