Work Item
ASTM WK68378

New Guide for Standard guide to the GUM

1. Scope

2.1 To develop a ASTM/NCSLI standard guide measurement uncertainty aligned to the GUM and its supplements 2.2 The intention for this document is to outline value, why estimate measurement uncertainty; explain the basics, simplified background statistics and the method, estimating measurement uncertainty in eight simple steps: 1) Identify the contributors to measurement uncertainty. 2) Decide on consistent uncertainty units. 3) Estimate magnitude of each uncertainty contributor, and express each as a standard uncertainty. 4) Document the basis for your estimates. 5) Combine the standard uncertainties. 6) Expand combined std uncertainty to represent desired confidence. 7) Reality check. 8) Report the result.


Uncertainty; Measurement Uncertainty; Uncertainty Budget ; Decision Rule; Statement of Conformity:


JCGM 104:2009 introduces measurement uncertainty, the GUM, the GUM Supplements and other documents that support the GUM. It is directed predominantly at the measurement of quantities that can be characterized by continuous variables such as length, temperature, time, and amount of substance. ASTM standard test methods do not necessarily follow this characterization. An introduction to measurement uncertainty for more broadly characterized measurement and testing aligned to the GUM and its supplements is needed by the testing community and industry users of measurement data. This standard will provide targeted information to streamline the gum method addressing the essential steps and fundamental principles. Users from the measurement and testing community can use the standard to guide them through the eight simple steps to understanding the uncertainties of their measurements.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: E11.50

Committee: E11

Staff Manager: Kelly Paul

Work Item Status

Date Initiated: 05-20-2019

Technical Contact: Andrew Oldershaw

Item: 000