sqacapability(編輯修改稿)
2025-01-26 18:36 本頁面
【文章內(nèi)容簡介】 Cp (best) = 6*sshorttermShort Term Capability IndicesZST = 3CpkMin (USL x , x LSL)3*sshorttermCpk =Min (USL x , x LSL)3*slongtermPpk =Cp is process capability potentialCpk is process capabilityPp is process performance potentialPpk is process performanceWe are concerned about LongTerm results in Step 4Think Zmin here6169。Black Decker (.), Inc.。 20236?SIX SIGMAProcess Study MethodStep 1: Obtain 50 to 100 parts manufactured over time.Step 2: Measure product feature based on QC dimensions.Step 3: Enter variable data into Minitab Step 4: Calculate Cpk and Ppk StatQuality ToolsCapability Analysis (Normal) Data arranged in single column. Subgroup size: For only shortterm data set equal to total partsFor only longterm data set equal to 1For shortlong bination set to subgroup size Enter upper and lower specificationsStep 5: Read Cpk, Ppk, and estimated PPM off chart produced. 7
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