Laboratory Metrology Proficiency Testing (PT) Program

The NIST Office of Weights and Measures Proficiency Testing (PT) Program is limited in scope to only those state and private calibration laboratories that participate in our U.S. Regional Measurement Assurance Program and conducts proficiency tests limited to mass calibration, volume calibration, and length (steel tapes and rules) calibration. 

In the content of the overall OWM Laboratory Metrology program, the PT program operations are described in an NCSL International Measures technical paper, originally published in June 2012.

OWM PT Policy and Quality System

• NISTIR 7082 "Proficiency Test Policy Plan"
  • January, 2018 -  PDF
• NISTIR 7214 "Weights and Measures Division Quality Manual For Proficiency Testing and Interlaboratory Comparisons"
  • Revision Date: March, 2005  - DOC PDF

PT Program Tools and Resources

• PT Plan - EXCEL
• PT Analysis Template - EXCEL
• PT Analysis Template YOUDEN - EXCEL

Further Information

• Graphical Diagnosis of Interlaboratory Test Results
• The Sample, the Procedures, the Laboratory
• Developing a Proficiency Testing Plan for your Laboratory
• Youden Analysis PowerPoint
• How to Get the Circle
• Metrology