1.1 ASTM标准的形式和样式 要求所有测试方法包含精度和偏差声明。此外，精度声明需要包含关于单操作员精度（重复性）的声明和关于多实验室精度（再现性）的声明。本规程为编制符合这些要求的精度和偏差声明提供了指导。还讨论了测试方法用户精度和偏差声明的目的和意义。符合本惯例的精度声明示例包括在 附录X1 . 本实践是对实践的补充 E177 并且是为了满足ASTM委员会处理建筑材料的需要而开发的。 注1 — 虽然这种做法由C09委员会管辖，但当前版本由C01和C09委员会共同开发，随后被其他处理建筑材料的委员会采用。 1.2本规程假设已按照规程完成实验室间研究（ILS） C802 或练习 E691 . 实验室间研究提供了编写精度和偏差声明所需的统计值。 1.3未规定本规程的单位制。实践中的尺寸量仅在精度和偏差声明示例中给出。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 The Form and Style for ASTM Standards requires that all test methods contain statements on precision and bias. Further, the precision statement is required to contain a statement on single-operator precision (repeatability) and a statement on multilaboratory precision (reproducibility). This practice provides guidance for preparing precision and bias statements that comply with these requirements. Discussion of the purpose and significance of precision and bias statements for users of test methods is also provided. Examples of precision statements that conform to this practice are included in Appendix X1 . This practice supplements Practice E177 and has been developed to meet the needs of ASTM Committees dealing with construction materials. Note 1 — Although this practice is under the jurisdiction of Committee C09, the current version was developed jointly by Committees C01 and C09 and has subsequently been adopted for use by other committees dealing with construction materials. 1.2 This practice assumes that an interlaboratory study (ILS) has been completed in accordance with Practice C802 or Practice E691 . The interlaboratory study provides the necessary statistical values to write the precision and bias statements. 1.3 The system of units for this practice is not specified. Dimensional quantities in the practice are presented only in examples of precision and bias statements. 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.