ISO 12745:2008提供了各种质量测量技术的偏差测试指南，用于估算每种技术的精度，并在应用其中一种技术进行估算时，计算湿质量的精度。 本指南基于统计测试的应用，以验证质量测量技术是无偏的，以估计方差作为其精度的最基本测量，并检查静态标尺在其工作范围内的线性。符合适用法规的校准方法和性能测试产生的测试结果可用于量化每种质量测量技术的精度和偏差，并验证静态称重装置的线性。 本指南适用于质量测量技术，用于估算货物或精矿装运的湿质量，作为运费和保险费、初步付款或贸易伙伴之间最终结算的基础。

ISO 12745:2008 provides guidelines to test for bias over a wide range of mass measurement techniques, to estimate the precision for each technique and to calculate the precision for wet mass when estimated by applying one of those techniques. The guidelines are based on the application of statistical tests to verify that a mass measurement technique is unbiased, to estimate the variance as the most basic measure for its precision and to check the linearity of a static scale over its working range. Calibration methods and performance tests for compliance with applicable regulations generate test results that can be used to quantify precision and bias for each of these mass measurement techniques and to verify linearity for static weighing devices. The guidelines apply to mass measurement techniques used to estimate the wet mass for cargoes or shipments of mineral concentrate as the basis for freight and insurance charges and for preliminary payments or for final settlements between trading partners.