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Everything you need to know about proficiency testing
What is Proficiency Testing?
Learn about the concept of proficiency testing and how the En-value metric is used to evaluate laboratory performance.
Learn More →Terms and Conditions
Review our terms and conditions for conducting business and participating in our proficiency testing programs.
View Terms →How Do I Participate?
Learn how our testing process works, from registration to receiving your final report.
Get Started →Questions for Your Provider
Important questions to ask of a proficiency testing provider, along with our answers.
View Questions →Sample Reports
See examples of our preliminary and final reports to understand what information is included.
View Samples →Technical Papers
Access our collection of papers covering various proficiency testing topics and best practices.
Read Papers →Other Services
Learn about our consulting services beyond standard proficiency testing.
View Services →Ready to Get Started?
Create a login ID to access your test history, book tests, and enter results.