ASTM C670 − 15 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

Scope of ASTM C670 − 15 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

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.

ASTM C670 − 15 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

Terminology
3.1 Definitions:
3.1.1 For definitions of general statistical terms, refer to Terminology E456.
3.2 Definitions of Terms Specific to This Standard:3
3.2.1 test determination, n—the value of a characteristic of a single test specimen obtained by a specified test method.