在BS ISO 13909-7:2016中，制定了公式，将有助于整体质量的变量联系起来 采样精度。本文描述了估算总体精度和推导测量值的方法 主增量方差，可用于修改采样方案以改变精度。 还描述了检查样品制备和测试方差的方法。交叉引用:ISO 13909-1ISO 13909-2ISO 13909-3ISO 13909-4ISO 13909-5ISO 13909-6ISO 13909-8购买本文件时提供的所有当前修订版均包含在购买本文件中。

In BS ISO 13909-7:2016, formulae are developed which link the variables that contribute to overall sampling precision. Methods are described for estimating overall precision and for deriving values for primary increment variance which can be used to modify the sampling scheme to change the precision. Methods for checking the variance of sample preparation and testing are also described.Cross References:ISO 13909-1ISO 13909-2ISO 13909-3ISO 13909-4ISO 13909-5ISO 13909-6ISO 13909-8All current amendments available at time of purchase are included with the purchase of this document.