统计过程分析控制图系数表.

计量值SPC 控制图系数表

样本大n [***********][***********]2425

均值控制图Xbar 控制界限系数A 2.1211.7321.5001.3421.2251.1341.0611.000.9490.9050.8860.8320.8020.7750.7500.7280.7070.6880.6710.6550.6400.6260.6120.600

A21.8801.0230.7290.5720.4830.4190.3730.3770.3080.2850.2660.2490.2350.2230.2120.2030.1940.1870.1800.1730.1670.1260.1570.153

A32.6591.9541.6281.4271.2871.1821.0991.0320.9750.9270.8860.8500.8170.7890.7630.7390.7180.6980.6800.6630.6470.6330.6190.606

中心线系数C40.7980.8860.9210.9400.9520.9590.9650.9690.9730.9750.9780.9790.9810.9820.9840.9850.9850.9860.9870.9880.9880.98909890.990

1/C41.2531.1281.0851.0641.0511.0421.0361.0321.0281.0251.0231.0211.0191.0181.0171.0161.0151.0141.0131.0131.0121.0111.0111.011

B300000.0300.1180.1850.290.2840.3210.3540.3820.4060.4280.4480.4660.4820.4970.5100.2530.5340.5450.5550.565标准差控制图S

控制界限系数B43.2672.5682.2662.0891.9701.8821.8151.7611.7161.6791.6461.6181.5941.1571.5521.5341.5181.5031.4901.4771.4661.4551.4451.435

B500000.0290.1130.1790.2320.2760.3130.3460.3740.3990.4210.4400.4580.4750.4900.5040.5160.5280.5390.5490.559

B62.6062.2762.0881.9641.8741.8061.7511.7071.6691.6371.6101.5851.5631.5441.5261.5111.4961.4831.4701.4591.4481.4381.4291.420

d21.1281.6932.0592.3262.5342.7042.8472.9703.0783.1733.2583.3363.4073.4723.5323.5883.6403.6893.7353.7783.8193.8583.8953.931

中心线系数

1/d20.8870.5910.4860.4300.3950.3700.3510.3370.3250.3150.3070.3000.2940.2880.2830.2790.2750.2710.2680.2650.2620.2590.2570.254

d30.8530.8880.8800.8640.8480.8330.8200.8080.7970.7870.7780.7700.7630.7560.7500.7440.7390.7340.7290.7240.7200.7160.7120.708

D1000000.2040.3880.5470.6870.8110.9221.0251.1181.2031.2821.3561.4241.4871.5491.6051.6591.7101.7591.806极差控制图R

控制界限系数D23.6864.3584.6984.9185.0785.2045.3065.3935.4695.5355.5945.6475.6965.7415.7825.8205.8565.8915.9215.9515.9796.0066.0316.056

D3000000.0760.1360.1840.2230.2560.2830.3070.3280.3470.3630.3780.3910.4030.4150.4250.4340.4430.4510.459

D43.2672.5742.2822.1142.0041.9241.8641.8161.7771.7441.7171.6931.6721.6531.6371.6221.6081.5971.5851.5751.5661.5571.5481.541

中位数控制图控制界限系数M31.0001.1601.0921.1981.1351.2141.1601.2231.176

M3A21.8801.1870.7960.6910.5490.5090.4320.4120.363

Xbar 图：UCL=总均值+A2*Rbar,LCL=总均值-A2*Rbar;Rbar图：UCL=D4*Rbar,LCL=D3*Rbar