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

Standard No.

ASTM C670-15

Release Date

2015

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C670-24

Latest

ASTM C670-24a

Scope

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.

ASTM C670-15 Referenced Document

• ASTM C1067 Standard Practice for Conducting a Ruggedness Evaluation or Screening Program for Test Methods for Construction Materials
• ASTM C802 Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials
• ASTM D6607 Standard Practice for Inclusion of Precision Statement Variation in Specification Limits
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E456 Standard Terminology for Relating to Quality and Statistics
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM C670-15 history

• 2024 ASTM C670-24a Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• 2024 ASTM C670-24 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• 2015 ASTM C670-15 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• 2013 ASTM C670-13 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• 2010 ASTM C670-10 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• 2003 ASTM C670-03 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
• 1996 ASTM C670-96 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials