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1、制程品质衡量方式的演进常态分布1850高斯管制图(%)1924W.AShewhart美国1960日本CaCpCpk(ppm)61980Motorola1992TI1994AlliedSignal95GE98Song1http:/ 共同原因：制程中变异因素是在统计的管制状态下，其产品之特性有固定的分配。 特殊原因：制程中变异因素不在统计的管制状态下，其产品之特性没有固定的分配。12http:/ 规各界限宽度kCp不良率ppmkCp不良率ppm0.000.001000000.0003.331.11868.4600.170.06867632.3353.501.17471.1100.330.11738
2、882.6803.661.22248.9540.500.17617075.0773.831.28128.1430.670.22504985.0754.001.3364.2410.830.28404656.7624.161.3931.3631.000.33317310.5084.331.4414.9111.170.39243345.0094.501.506.9031.330.44182422.4394.661.553.1111.500.50133614.4034.831.611.3651.670.5695580.7055.001.670.5831.830.6166753.0155.161.720.2432.000.6745500.2645.331.780.0982.170.7230260.2805.501.830.0392.330.7819630.6585.661.890.0152.500.8312419.3315.831.940.0062.670.897660.7616.002.000.0022.830.944606.5326.162.050.0013.001.002699.7966.332.110.00084http:/ 则其相互关系为：现有制程符合规格要求。3.26155.019060制程变异规格范围96http:/
