Stocker, M.
, Vorburger, T.
, Renegar, T.
, Thompson, R.
and Williford, M.
(2021),
Evaluating Measurement Uncertainty for Firearm Barrel and Overall Length Measurements, Journal of the Association of Firearms and Toolmarks Examiners
(Accessed November 23, 2024)
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.
Evaluating Measurement Uncertainty for Firearm Barrel and Overall Length Measurements
Published
Author(s)
, , , , Mark Williford
Abstract
In recent years, more forensic laboratories are seeking accreditation to ISO 17020 and 17025. In the field of firearm and toolmark forensics, the barrel length and overall length of a firearm are typical measurements performed in the laboratory to determine if a given firearm meets legal specifications defined in criminal law. An important and sometimes challenging aspect of seeking 17025 accreditation is generating statements of measurement traceability and measurement uncertainty. In this paper, we provide a case study demonstrating how measurement traceability and measurement uncertainty are derived for firearm barrel and overall length for the purposes of meeting accreditation criteria. Data and procedures from this successfully accredited forensic laboratory will be shown.Citation
Journal of the Association of Firearms and Toolmarks Examiners
Volume
53
Issue
4
Pub Type
Journals
Keywords
barrel length, overall length, measurement uncertainty, measurement traceability, laboratory accreditation, ISO 17025
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created November 1, 2021, Updated October 25, 2024