The purpose of this standard is to establish a program referring to the procedure to be followed for the planning and statistical interpretation of circular interlaboratory tests, aimed at establishing standardized methods to determine the values of chemical, chemical-physical and practical effectiveness characteristics. , in detergent formulations and in their components (surface agents, adjuvants, reinforcers, additives and fillers). For each stage of the program, this standard dedicates a chapter. As a typical example, the determination of the concentration of a chemical ingredient in a formulation is considered.