ISO 14461-1 | IDF 169-1:2005描述了通过确定菌落计数技术的实验室内可变性并识别与过度可变性相关的步骤，在实验室内测试菌落计数技术性能的程序。 该程序也适用于检查是否遵守良好实验室规范（GLP），这可能是参与菌落计数方法实验室间试验的先决条件。

ISO 14461-1|IDF 169-1:2005 describes a procedure for testing the performance of the colony-count technique within a laboratory by establishing the within-laboratory variability of its technique and identifying those steps that are associated with excessive variability. The procedure is also suitable for checking the proper observance of Good Laboratory Practice (GLP), which may be a prerequisite for participation in interlaboratory tests of colony-count methods.