1.1 This practice presents guidelines for preparing clear, meaningful precision statements for test method standards under the jurisdiction of ASTM Committee D-11 on Rubber Testing and for ASTM Committee D-24 on Carbon Black Testing. It explains the potential uses for standard test methods and gives the requirements for interlaboratory programs needed in precision formulation, the calculation algorithms for precision, and the format for expressing precision.

1.2 Test methods are used in many ways in technology. This broad usage requires careful consideration in assessing their general precision and, where pertinent, their accuracy. Clearly outlining the objectives and the uses of test methods prior to the determination of test precision is essential. A critical requirement for this is the development of a standardized nomenclature system. This practice addresses these and other issues important in evaluating precision for test method standards.

1.3 This practice is divided into the following sections:

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.