introductionofsixsigma(ppt47)(編輯修改稿)
2025-01-26 19:32 本頁面
【文章內容簡介】 Special Variation Goal ~ NID(?1, ?1178。) Natural Variation (177。3?1) Entitlement Opportunity for Improvement (?) ? 23 Belton Confidential: For training only Cost of Quality I nternal Fai l ure C ost s E xtern al Fai l ure Cos ts? S cr ap ? Cos t to Cus tom er? Rewo rk ? Warranty Cos t? S upplier S cr ap Re w ork ? R eturn ed Mate r ialApprai s al Cos ts P reven tion Cos ts? Ins pec ti on ? Q uali ty Planni ng? Te s ti ng ? P roce s s Planni ng? Q uali ty Audits ? P roce s s Control? Initi a l Main te n anc e Costs of ? Tra ining Tes t Inspe ct ion E quip mentOppo r tuni ty C os tsHard Savings Potential Savings Soft Savings 24 Belton Confidential: For training only Measure ?The Measure phase serves to validate or refine the problem, and to begin the search for root causes. It addresses ? the focus and extent of the problem, based on measures of the process, ? the key data required to narrow the problem to its major factors or vital few root causes. 25 Belton Confidential: For training only Capability Analysis — Conventional Metrics ? Reject Rate ? in percent (. %) ? in ratio (. ) ? in parts per million (. 74,000 DPPM) ? Yield ? in firsttime yield ? in final yield 26 Belton Confidential: For training only Capability Analysis Capability Analysis Conventional Metrics Six Sigma Metrics Reject rate In precent (eg, %) In defects per Unit (DPU) In Ratio (eg,..074) In defects per million opportunities (DPMO) In parts per million (eg, 74,000 dppm) In throughput yield Yield In firsttime yield In rolled throughput yield In final yield In normalized yield 27 Belton Confidential: For training only Defect per unit (DPU) ? Defects Per Unit : The average number of defects per unit produced. Defect Rate = Defects / Units = 7 / 5 = dpu 1 2 3 4 51 . A rm H e i g h t x2 . A rm t h i c k n e s s x3 . Bo re h o l e D i a4 . S w g a e h o l e D i a x x5 . Ro u g h n e s s6 . T e a rd ro p p ro fi l e x x7 . Ro l l8 . P i t c h xT o ta l D e fe c ts p e r D i s c 3 1 2 1 0A r m 28 Belton Confidential: For training only Defects Per Million Opportunities (DPMO) ? Opportunities : The number of possibilities for defect creation in any unit of product process or sequence of processes. 1. Arm Height 2. Arm thickness 3. Bore hole Dia 4. Swgae hole Dia 5. Roughness 6. Teardrop profile 7. Roll 8. Pitch Opportunities per Unit = 8 Number of Opportunities = Opportunities per Unit ? Number of Units = 8 ? 5 = 40 Defect Rate = Defects / Opportunities = (7 / 40 ) ? 106 = 175,000 dpmo 29 Belton Confidential: For training only DPMO vs Sigma Capability 0 . 0 23 . 42336 , 2 1 06 6 , 8 1 13 0 8 , 7 7 06 9 7 , 6 7 21 0 0 , 0 0 02 0 0 , 0 0 03 0 0 , 0 0 04 0 0 , 0 0 05 0 0 , 0 0 06 0 0 , 0 0 07 0 0 , 0 0 08 0 0 , 0 0 00 1 2 3 4 5 6 7S i g m a C a p a b i l i t yDefects Per Million Opportunity30 Belton Confidential: For training only Firsttime yield (Yft)
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