Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

ABC's of Conformity Assessment



Lisa J. Carnahan, Amy L. Phelps


The Standards Coordination Office periodically publishes information related to standards and conformity assessment as a service to producers and users of such systems – both in the public and private sector. This publication is designed to provide the reader with an introduction to conformity assessment and information on how the various conformity assessment activities are interlinked.
Special Publication (NIST SP) - 2000-01
Report Number


conformity assessment, certification, standards, testing, inspection, accreditation


Carnahan, L. and Phelps, A. (2018), ABC's of Conformity Assessment, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 27, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created September 30, 2018, Updated January 27, 2020