但实际加工现场,通常存在许多变量直接或间接地影响加工精度,如工件毛坯、余量及其误差等。
Using allowance error as the dimesion was proper, whereas adopting standarderror as the dimension might cause the high frenquence rework of compartment inventory.对抽样控制总体法中的差值(累偏)衡量的尺度进行了分析,指出用允许误差作尺度是恰当的,若用标准误作尺度势必造成小班调查的大量返工。
According to the allowance of production, the maximum error of measurement is used to determine the accuracy of the instrument.根据生产所允许的最大测量误差来确定仪表的精确度。