CPK和PPM的换算

当SQE审阅供应商的PPAP文件包的时候，如果供应商针对关键特性做的CPK分析得出的结论是1.33，你认为是满足标准要求的，那么CPK1.33到底是多少PPM，如果供应商的CPK数值不是1.0，1.33，1.67，2.0这些临界数值的时候，你还能预测供应商的PPM是多少吗？你能够根据供应商的CPK报告计算出供应商的报废率和质量成本的损失大概有多少吗

sigma水平、公差范围、CPK与不良率(PPM)对照表

1666.7%0.180.06800000107.5% 2.790.935270.868.0% 4.41 1.4710.34 769.2%0.390.137********.4% 2.820.944802.3667.6% 4.44 1.489 625.0%0.480.166********.3% 2.850.954371.9267.1% 4.47 1.497.82 454.5%0.660.22500000104.2% 2.880.963976.7566.7% 4.5 1.5 6.8 357.1%0.840.28400000103.1% 2.910.973614.2966.2% 4.53 1.51 5.9 303.0%0.990.33317310102.0% 2.940.983282.1265.8% 4.56 1.52 5.12 285.7% 1.050.35293800101.0% 2.970.99297865.4% 4.59 1.53 4.43 263.2% 1.140.38250000100.0%312699.864.9% 4.62 1.54 3.84 250.0% 1.20.423020099.0% 3.03 1.012445.5464.5% 4.65 1.55 3.32 232.6% 1.290.4320000098.0% 3.06 1.022213.3764.1% 4.68 1.56 2.87 222.2% 1.350.4517700097.1% 3.09 1.032001.5663.7% 4.71 1.57 2.48 208.3% 1.440.4815000096.2% 3.12 1.041808.5163.3% 4.74 1.58 2.14 196.1% 1.530.51126016.7395.2% 3.15 1.051632.762.9% 4.77 1.59 1.84 192.3% 1.560.52118759.8894.3% 3.18 1.061472.7562.5% 4.8 1.6 1.59 188.7% 1.590.53111834.8193.5% 3.21 1.071327.3562.1% 4.83 1.61 1.37 185.2% 1.620.54105232.2892.6% 3.24 1.081195.361.7% 4.86 1.62 1.17 181.8% 1.650.5598942.9491.7% 3.27 1.091075.4761.3% 4.89 1.63 1.01 178.6% 1.680.5692957.3290.9% 3.3 1.1966.8561.0% 4.92 1.640.8654 175.4% 1.710.5787265.8790.1% 3.33 1.11868.4660.6% 4.95 1.650.7421 172.4% 1.740.5881859.0289.3% 3.36 1.12779.4260.2% 4.98 1.660.6358 169.5% 1.770.5976727.1488.5% 3.39 1.13698.9359.9% 5.01 1.670.5443 166.7% 1.80.671860.6487.7% 3.42 1.14626.2159.5% 5.04 1.680.4655 163.9% 1.830.6167249.9487.0% 3.45 1.15560.5959.2% 5.07 1.690.3978 161.3% 1.860.6262885.5386.2% 3.48 1.16501.4158.8% 5.1 1.70.3397 158.7% 1.890.6358757.9685.5% 3.51 1.17448.1158.5% 5.13 1.710.2897 156.3% 1.920.6454857.984.7% 3.54 1.18400.1358.1% 5.16 1.720.2469 153.8% 1.950.6551176.1284.0% 3.57 1.19356.9857.8% 5.19 1.730.2103 151.5% 1.980.6647703.5383.3% 3.6 1.2318.2257.5% 5.22 1.740.1789 149.3% 2.010.6744431.1982.6% 3.63 1.21283.4257.1% 5.25 1.750.1521 147.1% 2.040.6841350.3382.0% 3.66 1.22252.2256.8% 5.28 1.760.1292 144.9% 2.070.6938452.3481.3% 3.69 1.23224.2556.5% 5.31 1.770.1096

CPK 不合格率对照表

Cpk PPM Cpk PPM Cpk PPM 0.51 126016.73 1.01 2445.54 1.51 5.90 0.52 118759.88 1.02 2213.37 1.52 5.12 0.53 111834.81 1.03 2001.56 1.53 4.43 0.54 105232.28 1.04 1808.51 1.54 3.84 0.55 98942.94 1.05 1632.70 1.55 3.32 0.56 92957.32 1.06 1472.75 1.56 2.87 0.57 87265.87 1.07 1327.35 1.57 2.48 0.58 81859.02 1.08 1195.30 1.58 2.14 0.59 76727.14 1.09 1075.47 1.59 1.84 0.60 71860.64 1.10 966.85 1.60 1.59 0.61 67249.94 1.11 868.46 1.61 1.37 0.62 62885.53 1.12 779.42 1.62 1.17 0.63 58757.96 1.13 698.93 1.63 1.01 0.64 54857.90 1.14 626.21 1.64 0.8654 0.65 51176.12 1.15 560.59 1.65 0.7421 0.66 47703.53 1.16 501.41 1.66 0.6358 0.67 44431.19 1.17 448.11 1.67 0.5443 0.68 41350.33 1.18 400.13 1.68 0.4655 0.69 38452.34 1.19 356.98 1.69 0.3978 0.70 35728.84 1.20 318.22 1.70 0.3397 0.71 33171.61 1.21 283.42 1.71 0.2897 0.72 30772.67 1.22 252.22 1.72 0.2469 0.73 28524.24 1.23 224.25 1.73 0.2103 0.74 26418.77 1.24 199.22 1.74 0.1789 0.75 24448.95 1.25 176.83 1.75 0.1521 0.76 22607.69 1.26 156.83 1.76 0.1292 0.77 20888.15 1.27 138.97 1.77 0.1096 0.78 19283.74 1.28 123.03 1.78 0.0929