ASTM E2655

ASTM E2655 is a technical guide for reporting uncertainty of test results and for using the term measurement uncertainty in ASTM test methods. It helps standardize how uncertainty is described so test data are communicated more clearly and consistently. This matters when results are compared, reported, or used for compliance and quality decisions, because uncertainty language can affect how confidently a measurement is interpreted.

ASTM E2655 standard overview

The ASTM E2655 standard provides guidance for expressing uncertainty associated with test results and for applying the term measurement uncertainty within ASTM test methods. As a guide, it is intended to support consistent reporting rather than define product-specific acceptance limits. The document is most relevant where test methods produce numerical results that may need contextual interpretation. By encouraging clearer uncertainty statements, it helps align test reporting with common ASTM practice and improves the usefulness of technical data.

Where is ASTM E2655 used?

This guide is commonly used in laboratory and quality-control environments where ASTM test methods generate measured results that must be reported with care. It is especially relevant for testing workflows, calibration-related reporting, and evaluation programs that rely on numerical data and consistent terminology. ASTM E2655 may also be referenced when organizations need a shared approach to describing uncertainty in records, certificates, or test reports used for engineering, procurement, or compliance purposes.

Practical importance of ASTM E2655

In practice, ASTM E2655 helps reduce ambiguity in how test results are presented and understood. Clear uncertainty reporting supports better comparisons between laboratories, more reliable product evaluation, and stronger technical communication across teams. It can also help organizations maintain consistency in documentation and avoid confusion around the phrase measurement uncertainty. For users of ASTM test methods, that consistency can improve confidence in reported data and support more defensible decisions.

• Guidance for reporting test result uncertainty
• Consistent use of measurement uncertainty terminology
• Support for ASTM test method reporting
• Useful for laboratory and quality documentation
• Helps improve clarity in technical results