6s黑帶培訓(xùn)教材1英文(編輯修改稿)

　

【文章內(nèi)容簡(jiǎn)介】 d Standard Deviation is the default method. 2Wit hin dR? ?4With in cS? ? ? ? ? ? ?? ? ? ? ? ?1n1n1n S1nS1nS1nc1?m212mm2222114Wit hin ????????????????Process Capability Analysis 37 Information, the way you want itEstimating ?Within and ?Overall In cases where there is only 1 observation per subgroup (. k=1), the Moving Range Method is used, where . The within variation ?Within is then estimated using either a) the Average Moving Range : b) the Median Moving Range : 1iii XXMR ??? 2Withi n dMR? ??~ 2Withi n?Process Capability Analysis 38 Information, the way you want itExample 3 The length of a camshaft for an automobile engine is specified at 600 177。 2 mm. Control of the length of the camshaft is critical to avoid scrap/rework. The camshaft is provided by an external supplier. Assess the process capability for this supplier. The data is available in Process Capability . Process Capability Analysis 39 Information, the way you want itExample 3 Stat ? Quality Tools ? Capability Analysis (Normal) Process Capability Analysis 40 Information, the way you want itExample 3 6 0 46 0 36 0 26 0 16 0 05 9 95 9 85 9 75 9 6T a r g e t U S LL S LP r o c e s s C a p a b i l i t y f o r C a m s h a f t L e n g t hP P M T o t a lP P M U S LP P M L S LP P M T o t a lP P M U S LP P M L S LP P M T o t a lP P M U S LP P M L S LP p kP P LP P UP pC p mC p kC P LC P UC pS t D e v ( O v e r a l l )S t D e v ( W i t h i n )S a m p l e NM e a nL S LT a r g e tU S L1 3 5 6 5 0 . 6 7 7 4 8 5 6 . 3 4 6 0 7 9 4 . 3 21 0 4 4 3 8 . 2 5 5 8 4 4 8 . 0 9 4 5 9 9 0 . 1 6 5 0 0 0 0 . 0 0 1 0 0 0 0 . 0 0 4 0 0 0 0 . 0 00 . 4 80 . 5 20 . 4 80 . 5 00 . 5 00 . 5 20 . 5 60 . 5 20 . 5 41 . 3 3 8 3 81 . 2 2 9 6 41 0 06 0 0 . 0 7 25 9 8 . 0 0 06 0 0 . 0 0 06 0 2 . 0 0 0E x p . O v e r a l l P e r f o r m a n c eE x p . W i t h i n P e r f o r m a n c eO b s e r v e d P e r f o r m a n c eO v e r a l l C a p a b i l i t yP o t e n t i a l ( W i t h i n ) C a p a b i l i t yP r o c e s s D a t aW i t h i nO v e r a l lProcess Capability Analysis 41 Information, the way you want itExample 3A Histogram of camshaft length suggests mixed populations. Further investigation revealed that there are two suppliers for the camshaft. Data was collected over camshafts from both sources. Are the two suppliers similar in performance? If not, what are your remendations? Process Capability Analysis 42 Information, the way you want itExample 3A Stat ? Quality Tools ? Capability Sixpack(Normal) Process Capability Analysis 43 Information, the way you want itExample 3A 2 01 006 0 0 . 56 0 0 . 05 9 9 . 55 9 9 . 0X b a r a n d R C h a r tS u b g rMeanM e a n = 5 9 9 . 5U C L = 6 0 0 . 3L C L = 5 9 8 . 83210RangeR = 1 . 3 4 1U C L = 2 . 8 3 5L C L = 02 01 00L a s t 2 0 S u b g r o u p s6 0 16 0 05 9 95 9 8S u b g r o u p N u m b e rValues6 0 2T5 9 8C a p a b i l i t y P l o tP r o c e s s T o l e r a n c eIIIIIIIIIS p e c i f i c a t i o n sW i t h i nO v e r a l l6 0 1 . 05 9 9 . 55 9 8 . 0N o r m a l P r o b P l o t6 0 1 . 05 9 9 . 55 9 8 . 0C a p a b i l i t y H i s t o g r a mW i t h i nS t D e v :C p :C p k :0 . 5 7 6 4 2 91 . 1 60 . 9 0O v e r a l lS t D e v :P p :P p k :C p m :0 . 6 2 0 8 6 51 . 0 70 . 8 30 . 8 7P r o c e s s C a p a b i l i t y f o r C a m s h a f t L e n g t h ( S u p p l i e r A )Process Capability Analysis 44 Information, the way you want itExample 3A 2 01 006 0 46 0 26 0 05 9 8X b a r a n d R C h a r tS u b g rMean11M e a n = 6 0 0 . 2U C L = 6 0 2 . 5L C L = 5 9 8 . 07 . 55 . 02 . 50 . 0RangeR = 3 . 8 9 0U C L = 8 . 2 2 5L C L = 02 01 00L a s t 2 0 S u b g r o u p s6 0 3 . 56 0 1 . 05 9 8 . 55 9 6 . 0S u b g r o u p N u m b e rValues6 0 25 9 8C a p a b i l i t y P l o tP r o c e s s T o l e r a n c eIIIIIIIIS p e c i f i c a t i o n sW i t h i nO v e r a l l6 0 56 0 05 9 5N o r m a l P r o b P l o t6 0 56 0 05 9 5C a p a b i l i t y H i s t o g r a mW i t h i nS t D e v :C p :C p k :1 . 6 7 2 3 10 . 4 00 . 3 5O v e r a l lS t D e v :P p :P p k :1 . 8 7 8 6 10 . 3 50 . 3 1P r o c e s s C a p a b i l i t y f o r C a m s h a f t L e n g t h ( S u p p l i e r B )Process Capability Analysis 45 Information, the way you want itWhat’s Six Sigma Quality — Then Original Definition by Motorola: ? if the specification limits are at least 177。 6? away from the process mean ?, . Cp ? 2, ? and the process shifts by less than ?, . Cpk ? , ? then the process will yield less than dppm rejects. 6? 6? Shift ? ? Process Capability Analysis 46 Information, the way you want itWhat’s Six Sigma Quality — Now Mikel J Harry claims that the process mean between lots will vary, with an average process shift of ?. k? = z? + ? k? = z? + ? Shift ? z? Note: Sigma Capability = ?(dpmo) ? ?(dppm) Process Capability Analysis 47 Information, the way you want itProcess Capability for NonNormal Data Not every measured characteristic is normally distributed. Characteristic Distribution Cycle Time Exponential Reject Rate Binomial Defect Rate Poisson Process Capability Analysis 48 Information, the way you want itProcess Capability for Cycle Time The Weibull Distribution is a general family of distribution with where scale parameter ? is the value at which CDF=%, and shape parameter ? determines the shape of the PDF. ? ???????? ?????????? x1 ex,。xWeibu llProcess Cap