6件,共为10组。计算过程如下例:设备名称零件名称料号工序名称设备编号日期质量要求0.14±0.04g上公差0.04下公差0.04操作者测量人员测量工具电子天平秤制表人序号X1X2X3X4X5X6平均X积差R频数分布:平均数=X=0.1404标准偏差s=0.0045能力指数Cmk=(T-2θ)/8S=2.207410.1480.1340.1380.1410.1380.140.13980.014020.1370.1360.140.1350.1480.1450.14020.013030.1350.1480.1390.140.1380.1430.14050.013040.1450.140.1350.1390.1420.1480.14150.013050.140.1390.1410.1360.1480.1350.13980.013060.1450.1430.1350.1420.1470.01350.14120.012070.1420.1430.1340.1370.1400.1390.13920.009080.1480.1430.1370.1480.1350.1430.14230.013090.1480.1340.1400.1390.1410.1350.13950.0140100.1390.1400.1350.1430.1480.1370.14030.0130说明:Xmax=0.1480Xmin=0.1340M=(Xmax+Xmin)/2=0.1410T为公差带n为抽样数s=i=1、2、……、nθ=|M-X|=0.0006T=0.0800Cmk=≈=2.2074当制表人发现设备能力Cmk<1.67时,应报告设备主管,设备主管及时采取措施,按OP12《制造过程有效性评定程序》要求执行。相关记录表格编号表格名称保存期保存方式职能WI12-04F01设备能力指数Cmk值测定表2年纸制工程部