6SIGMA某工作案例-3.ppt

NOV-23-2000,Page1,2）C/LMould(Cavity别)差异分析,A,A,特异点原因：1EAC/L破损,对CKDMould进行Cavity别2-SampleTTest,Cavity别具体分析,NOV-23-2000,Page2,Individual95%CIsForMeanBasedonPooledStDevLevelNMeanStDev-+-+-+-C21-154.49400.0472(-*-)C21-254.51400.0055(-*-)C21-354.53000.0000(-*-)C21-454.52000.0071(-*-)C31-154.50600.0055(-*-)C31-254.51800.0045(-*-)C31-354.50800.0045(-*-)C31-454.51600.0055(-*-)C41-154.51600.0055(-*-)C41-254.51800.0045(-*-)C41-354.52800.0045(-*-)C41-454.52800.0045(-*-)C51-154.51800.0045(-*-)C51-254.52400.0055(-*-)C51-354.49800.0045(-*-)C51-454.51200.0045(-*-)C91-154.50600.0055(-*-)C91-254.51000.0000(-*-)C91-354.51000.0000(-*-)C91-454.50600.0055(-*-)K52-154.51200.0045(-*-)K52-254.52600.0089(-*-)K52-354.42200.0045(-*-)K52-454.45200.0045(-*-)-+-+-+-PooledStDev=0.01084.4454.4804.515,One-wayANOVA:C/LDiameter_1versusNutCavityAnalysisofVarianceforC/LDiamSourceDFSSMSFPNutCavi230.0667600.00290324.970.000Error960.0111600.000116Total1190.077920,【续上】,对CKDMould与其他全部Cavity别2-SampleTTest,NOV-23-2000,Page3,A,Two-SampleT-TestandCI:K52,C*Two-sampleTforK52vsC*NMeanStDevSEMeanC*204.53220.01020.0023K52204.451910.009450.0021Difference=muK52-2-muK52-3Estimatefordifference:0.0802795%CIfordifference:(0.07396,0.08658)T-Testofdifference=0(vsnot=):T-Value=25.77P-Value=0.000DF=37,【续上】,NOV-23-2000,Page4,A,3）Line(Operator)Analysis,NOV-23-2000,Page5,A,DefectDataAnalysisforLine,NOV-23-2000,Page6,LineDefectAnalysis,A,NOV-23-2000,Page7,DefectEffectbyLineAnalysis,A,NOV-23-2000,Page8,Chi-SquareTest:OK,NGExpectedcountsareprintedbelowobservedcountsOKNGTotalMachine123256532330923253.5555.45Machine222760452280522750.7554.25Machine320360722043220383.3948.61Machine422528422257022516.3153.69Total8890421289116Chi-Sq=0.000+0.108+0.004+1.578+0.027+11.259+0.006+2.546=15.528DF=3,P-Value=0.001,p-value值小于0.05，因此可得出设备别不良发生率的概率有差异。,3号机器的Chi-sq值最大。因此我们用2号机器和其它机器进行一下比较。,A,11/8日富钢业体4台Nut压入机一天不良统计表,4）MachineChi-SquareTest,NOV-23-2000,Page9,Chi-SquareTest:OK,NGOKNGTotalMachine123256532330923261.4947.51Machine222760452280522758.5246.48Machine422528422257022524.0046.00Total6854414068684Chi-Sq=0.001+0.634+0.000+0.047+0.001+0.349=1.032DF=2,P-Value=0.597P-Value0.05Machine1,2,4无差异,Chi-SquareTest:OK,NGOKNGTotalMachine320360722043220382.2549.75Machine1,2,4685441456868968521.75167.25Total8890421789121Chi-Sq=0.024+9.951+0.007+2.960=12.943DF=1,P-Value=0.000P-Value0.05Machine3与Machine1,2,4有差异，原因分析：Machine3Jig定位块高度不良，使冲头压入不完全。对策：取掉限位块，使冲头能完全压入。,A,【续上】,NOV-23-2000,Page10,A-Phase小结,NOV-23-2000,Page11,I-PhaseNutForceDOE,NOV-23-2000,Page12,Data收集,NOV-23-20