【正文】
PpkPPM LSLPPM USLPPM TotalPPM LSLPPM USLPPM TotalPPM LSLPPM USLPPM Total * 50 * Process DataPotential (ST) CapabilityOverall (LT) Capability Observed Performance Expected ST Performance Expected LT PerformanceSTLT長(zhǎng)期和短期的標(biāo) 準(zhǔn)偏差的差距變大 潛在工序能力 比較清楚 Fillup 如果有理數(shù)子集沒(méi)有形成 ?. ? 打開(kāi) Minitab 文件 process . ? Graph Time Series Plot Regarding “fillup1”, Time Series Plot Fillup 1 10 20 30 40 50Index面面面子集內(nèi)的變動(dòng)變大, 但集團(tuán)間的變動(dòng)不一定 明顯。 7 8 9 10 11 12 13LSL USLProcess Capability Analysis for 面面面USLTargetLSLMeanSample NStDev (ST)StDev (LT)CpCPUCPLCpkCpmPpPPUPPLPpkPPM LSLPPM USLPPM TotalPPM LSLPPM USLPPM TotalPPM LSLPPM USLPPM Total * 50 *Process DataPotential (ST) CapabilityOverall (LT) Capability Observed Performance Expected ST Performance Expected LT PerformanceSTLTThe gap of standard deviations between longterm and shortterm appears small. The potential capability can be underestimated. Fillup 用 Minitab Capability Sixpack 分析 ? StatQuality Tools Capability Sixpack(Normal) 2 . 82 . 42 . 0C a p a b i l i t y H i s t o g r a m1 0 09 08 07 06 05 04 03 02 01 003 . 02 . 62 . 21 . 8I n d i v i d u a l a n d M R C h a r tO b s e r .Individual ValueM U = 2 . 3 4 8U C L = 2 . 8 8 0L C L = 1 . 8 1 70 . 60 . 40 . 20 . 0Mov.RangeR = 0 . 1 9 9 8U C L = 0 . 6 5 2 8L C L = 0 . 0 0 09 08 07 0L a s t 2 5 O b s e r v a t i o n s2 . 72 . 52 . 32 . 1O b s e r v a t i o n N u m b e rValues2 . 82 . 02 . 8 7 9 5 91 . 8 1 6 7 9 P p : 0 . 7 5 P P U : 0 . 8 5 P P L : 0 . 6 6 P p k : 0 . 6 6C 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 eS p e c i f i c a t i o n sS t D e v : 0 . 1 7 7 1 3 3IIIIII2 . 82 . 42 . 0N o r m a l P r o b P l o tC a p a b i l i t y S i x p a c k O v e r a l l S t a n d a r d D e v i a t i o n工序能力的測(cè)定值 Is there any pattern by special cause? 檢查 規(guī)律性 ? 利用 Minitab Capability Sixpack,數(shù)據(jù)的控制狀態(tài)和規(guī)律性