控制图的系数和公式表X—R图*X—S图*极差R图标准差S图子组容量均值X图均值X图计算控制限标准差估计算控制标准差估计算控制限用的系数计算控制限用的系数用的系数计值的除限用的系计值的除nA2d2D3D4A3C4B3B421.881.128—3.2672.6590.7979—3.26731.0231.693—2.5741.9540.8862—2.56840.7292.059—2.2821.6280.9213—2.26650.5772.326—2.1141.4270.94—2.08960.4832.534—2.0041.2870.95150.031.9770.1492.7040.0761.9241.1820.95940.1181.88280.3732.8470.1361.8641.0990.9650.1851.81590.3372.970.1841.8161.0320.96930.2391.761100.3083.0780.2231.7770.9750.97270.2841.716110.2853.1730.2561.7440.9270.97540.3211.679120.2663.2580.2831.7170.8860.97760.3541.646130.2493.3360.3071.6930.850.97940.3821.618140.2353.4070.3281.6720.8170.9810.4061.594150.2233.4720.3471.6530.7890.98230.4281.572160.2123.5320.3631.6370.7630.98350.4481.552170.2033.5880.7381.6220.7390.98450.4661.534180.1943.640.3911.6080.7180.98540.4821.518190.1873.6890.4031.5970.6980.98620.4971.503200.183.7350.4151.5850.680.98690.511.49210.1733.7780.4251.5750.6630.98760.5231.477220.1673.8190.4341.5660.6470.98820.5341.466230.1623.8580.4431.5570.6330.98870.5451.455240.1573.8950.4511.5480.6190.98920.5551.445250.1533.9310.4591.5410.6060.98960.5651.435UCL/LCL=X±ARUCL/LCL=X±ASXX2XX3控制限计UCL=DRUCLS=BSR44算LCL=DRLCLS=BSR33σ=R/dσ=S/C24*摘自ASTM—STP—15D，《数据和控制图分析形式手册》1976年版，第134~136页。ASTM版权所有，经允许后复制（1916Race+Street，Philadelphia，Pennsylvania19103）控制图的系数和公式表子组容量中位数图**单值图*中位数X图极差R图单位X图极差R图计算控制限标准差估计算控制标准差估计算控制限用的系数计算控制限用的系数用的系数计值的除限用的系计值的除nA2d2D3D4E2d2D3D421.881.128—3.2672.661.128—3.26731.1871.693—2.5741.7721.696—2.57440.7962.059—2.2821.4572.059—2.28250.6912.326—2.1141.292.326—2.11460.5482.534—2.0041.1842.534—2.00470.5082.7040.0761.9241.1092.7040.0761.92480.4332.8470.1361.8641.0542.8470.1361.86490.4122.970.1841.8161.012.970.1841.816100.3623.0780.2231.7770.9753.0780.2231.777UCL/LCL=X±ARUCL/LCL=X±ERXX2XX2控制限计UCL=DRUCLS=DRR44算LCL=DRLCLS=DRR33σ=R/dσ=S/C24*摘自ASTM—STP—15D，《数据和控制图分析形式手册》1976年版，第134~136页。ASTM版权所有，经允许后复制（1916RaceStreet，Philadelphia，Pennsylvania19103）**A系数取自ASTM—STP—15D“数据和效率表“