sigma水平、公差范围、CPK与不良率(PPM)对照表.pdf
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sigma水平、公差范围、CPK与不良率(PPM)对照表.pdf
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水平、公差T、CPk水平与不良品率的关系一览表%T%T%T%TK(K(K(K()CpkCpkCpkCpkPPMPPMPPMPPM%T%T%T%TK(K(K(K()CpkCpkCpkCpkPPMPPMPPMPPM%T%T%T%TK(K(K(K()CpkCpkCpkCpkPPMPPMPPMPPM1666.7%0.180.06800000107.5%2.790.935270.868.0%4.411.4710.34769.2%0.390.13700000106.4%2.820.944802.3667.6%4.441.489625.0%0.480.16600000105.3%2.850.954371.9267.1%4.471.497.82454.5%0.660.22500000104.2%2.880.963976.7566.7%4.51.56.8357.1%0.840.28400000103.1%2.910.973614.2966.2%4.531.515.9303.0%0.990.33317310102.0%2.940.983282.1265.8%4.561.525.12285.7%1.050.35293800101.0%2.970.99297865.4%4.591.534.43263.2%1.140.38250000100.0%312699.864.9%4.621.543.84250.0%1.20.423020099.0%3.031.012445.5464.5%4.651.553.32232.6%1.290.4320000098.0%3.061.022213.3764.1%4.681.562.87222.2%1.350.4517700097.1%3.091.032001.5663.7%4.711.572.48208.3%1.440.4815000096.2%3.121.041808.5163.3%4.741.582.14196.1%1.530.51126016.7395.2%3.151.051632.762.9%4.771.591.84192.3%1.560.52118759.8894.3%3.181.061472.7562.5%4.81.61.59188.7%1.590.53111834.8193.5%3.211.071327.3562.1%4.831.611.37185.2%1.620.54105232.2892.6%3.241.081195.361.7%4.861.621.17181.8%1.650.5598942.9491.7%3.271.091075.4761.3%4.891.631.01178.6%1.680.5692957.3290.9%3.31.1966.8561.0%4.921.640.8654175.4%1.710.5787265.8790.1%3.331.11868.4660.6%4.951.650.7421172.4%1.740.5881859.0289.3%3.361.12779.4260.2%4.981.660.6358169.5%1.770.5976727.1488.5%3.391.13698.9359.9%5.011.670.5443166.7%1.80.671860.6487.7%3.421.14626.2159.5%5.041.680.4655163.9%1.830.6167249.9487.0%3.451.15560.5959.2%5.071.690.3978161.3%1.860.6262885.5386.2%3.481.16501.4158.8%5.11.70.3397158.7%1.890.6358757.9685.5%3.511.17448.1158.5%5.131.710.2897156.3%1.920.6454857.984.7%3.541.18400.1358.1%5.161.720.2469153.8%1.950.6551176.1284.0%3.571.19356.9857.8%5.191.730.2103151.5%1.980.6647703.5383.3%3.61.2318.2257.5%5.221.740.1789149.3%2.010.6744431.1982.6%3.631.21283.4257.1%5.251.750.1521147.1%2.040.6841350.3382.0%3.661.22252.2256.8%5.281.760.1292144.9%2.070.6938452.3481.3%3.691.23224.2556.5%5.311.770.1096水平、公差T、CPk水平与不良品率的关系一览表%T%T%T%TK(K(K(K()CpkCpkCpkCpkPPMPPMPPMPPM%T%T%T%TK(K(K(K()CpkCpkCpkCpkPPMPPMPPMPPM%T%T%T%TK(K(K(K()CpkCpkCpkCpkPPMPPMPPMPPM142.9%2.10.735728.8480.6%3.721.24199.2256.2%5.341.780.0929140.8%2.130.7133171.6180.0%3.751.25176.8355.9%5.371.790.0787138.9%2.160.7230772.6779.4%3.781.26156.8355.6%5.41.80.0666137.0%2.190.7328524.2478.7%3.811.27138.9755.2%5.431.810.0564135.1%2.220.7426418.7778.1%3.841.28123.0354.9%5.461.820.0476133.3%2.250.7524448.9577.5%3.871.29108.8454.6%5.491.830.0402131.6%2.280.7622607.6976.9%3.91.396.1954.3%5.521.840.0339129.9%2.310.7720888.1576.3%3.931.3184.9554.1%5.551.850.0286128.2%2.340.7819283.7475.8%3.961.3274.9553.8%5.581.860.0241126.6%2.370.7917788.0975.2%3.991.3366.0753.5%5.611.870.0202125.0%2.40.816395.0774.6%4.021.3458.253.2%5.641.880.017123.5%2.430.8115098.8274.1%4.051.3551.2252.9%5.671.890.0143122.0%2.460.8213893.773.5%4.081.3645.0452.6%5.71.90.012120.5%2.490.8312774.3173.0%4.111.3739.5752.4%5.731.910.01119.0%2.520.8411735.4872.5%4.141.3834.7352.1%5.761.920.0084117.6%2.550.8510772.2971.9%4.171.3930.4651.8%5.791.930.007116.3%2.580.869880.0371.4%4.21.426.6951.5%5.821.940.0059114.9%2.610.879054.2270.9%4.231.4123.3751.3%5.851.950.0049113.6%2.640.888290.670.4%4.261.4220.4451.0%5.881.960.0041112.4%2.670.897585.1269.9%4.291.4317.8750.8%5.911.970.0034111.1%2.70.96933.9569.4%4.321.4415.650.5%5.941.980.0029109.9%2.730.916333.4369.0%4.351.4513.6150.3%5.971.990.0024108.7%2.760.925780.1468.5%4.381.4611.8750.0%620.002Note:
1、availableforbilateraltolerance(双向公差适用)2、k()对应于控制范围,是实际的计算值,如果客户规范公差范围对应的k值是2.34,对应的cpk是0.78,不良品率=19283ppm3、%T是实际控制6占规范公差T的比例,假如实际6等于规范公差T,则CPk=1.0。
CPK要达到1.33的水平,6=T*75%。
举例:
1、客户公差范围T=5,我们内控6范围=4,则%T=80%,对应的CPK=1.25,不良品率=175.8ppm2、实际的CPK=0.83,控制范围:
2.49,按6sigma理论则是5sigma。
3、6sigma项目是指CPK2.0,公差带内需能容纳12(6)。
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- 关 键 词:
- sigma 水平 公差 范围 CPK 不良 PPM 对照
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