Is a precision and bias required in a standard test method?
Per the ASTM Form and Style Manual Section A21 , precision and bias is required in a test method. A21. Precision and Bias (Mandatory) A21.2 Statement of Precision (Mandatory): A21.2.1 Precision is the closeness of agreement between test results obtained under prescribed conditions. A statement on precision allows potential users of the test method to assess in general terms its usefulness in proposed applications. A statement on precision is not intended to contain values that can be duplicated in every user’s laboratory. Instead the statement provides guidelines as to the kind of variability that can be expected between test results when the test method is used in one or more reasonably competent laboratories. A21.2.2 Every test method shall contain a statement (1) regarding the precision of test results obtained in the same laboratory under specifically defined conditions of within-laboratory variability (repeatability conditions), and (2) regarding the precision of test results obta
Related Questions
- How long should a committee wait after the development of a standard test method to include a precision and bias statement?
- When a Practice is being turned into a Standard Test Method, does it still need to have a precision and bias statement?
- What happens if we find an old standard test method without a precision and bias statement? Is it grandfathered in?
