控制图的常数和公式表
Ｘ-Ｒ图均值Ｘ图计算控子组
Ｘ-s图均值Ｘ 全距Ｒ图图 标准差Ｓ图标准差计算控标准差估
计算控制限用的系计算控制限用的系
容量
制限用的系数
n
A2
2
1.88031.02340.72950.57760.48370.41980.37390.337100.308110.285120.266130.249140.235150.223160.212170.20318
0.194
190.187200.180210.173220.167230.162240.157250.153UCLX,LCLX =UCLR = D4RLCLR = D3R估计值的除数d2
1.1281.6932.0592.3262.5432.7042.8472.9703.0783.1733.2583.3363.4073.4723.5323.5883.640
3.6893.7353.7783.8193.8583.8953.931X±A2R数制限用的系数D3
D4
A3
-3.2672.659-2.5711.954-2.2821.628-2.1141.427-2.0041.2870.0761.9241.1820.1361.8641.0990.1841.8161.0320.2231.7770.9750.2561.7440.9270.2831.7170.8860.3071.6930.8500.3281.6720.8170.3471.6530.7890.3631.6370.7630.3781.6220.7390.391
1.608
0.718
0.4031.5970.6980.415
1.5850.6800.4251.5750.6630.4341.5660.6470.4431.5570.6330.4511.5480.6190.4591.5410.606UCLX,LCLX =UCLS = B4sLCLS = B3s计值的除
数
c4
0.79790.88620.92130.94000.95150.95940.96500.96930.97270.97540.97760.97940.98100.98230.98350.98450.9854
0.98620.98690.98760.98820.98870.98920.9896X±A2R数
B3
B4
-3.276-2.568-2.266-2.0890.0301.9700.1181.8820.1851.8150.2391.7610.2841.7160.3211.6790.3541.6400.3821.6180.4061.5940.4281.5720.4481.5520.4461.5340.482
1.518
0.4971.503
0.510
1.4900.5231.4770.5341.4660.5451.4550.5551.4450.5651.435
控制图的常数和公式表
