Full Name

ASTM E29 – Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications


This practice is intended to assist the various technical committees in the use of uniform methods of indicating the number of digits which are to be considered significant in specification limits, for example, specified maximum values and specified minimum values.

Its aim is to outline methods which should aid in clarifying the intended meaning of specification limits with which observed values or calculated test results are compared in determining conformance with specifications.


absolute method; conformance; rounding; significant digits; specifications; test data