FAQ

What’s the difference between a proficiency test (PT) and an interlaboratory comparison (ILC)?
An Interlaboratory Comparison (ILC) looks at measurement results between several laboratories. The purpose of an ILC could be to evaluate methods, different...
Wed, 9 Feb, 2022 at 11:42 AM
What is a normalized Error (En)?
A normalized error compares a lab’s measurement result and its associated uncertainty with a reference value and uncertainty to determine if they are in agr...
Wed, 9 Feb, 2022 at 1:14 PM
You don’t offer a kit that I need - what are my options?
NAPT Intra Manager, AKA Intra Wizard, is our latest online application that was designed for additional & specialized proficiency testing methods. NAPT ...
Wed, 9 Feb, 2022 at 11:35 AM
I need help in deciding what PT kits to sign up for - what kind of help can I get?
Deciding what tests to enroll in may seem challenging and difficult, thankfully, NAPT is here to help. On NAPT's website, www.proficincy.org. There are ...
Wed, 9 Feb, 2022 at 11:41 AM
Does NAPT calculate uncertainties for participants?
No. It is the responsibility of the lab submitting results to calculate all uncertainties associated with any measurement made by them. It is not NAPT’s pla...
Tue, 14 Feb, 2023 at 12:20 PM
How do you want me to calibrate your artifact?
The main goal of any enrollment is to compare measurements using your processes and reference values and evaluate your results against other like organizati...
Wed, 9 Feb, 2022 at 1:17 PM
What is the Intra-laboratory PT process?
NAPT offers two different tiers for utilizing the Intra Manager: NAPT Assisted & Self-Managed.    When selecting a NAPT Assisted, NAPT staff will coll...
Wed, 9 Feb, 2022 at 3:10 PM
What do I do when the kit arrives at my location?
As soon as the kit arrives, we ask that you carefully inspect the entire kit to ensure there are no missing items or damage. After inspecting the kit conten...
Thu, 9 Feb, 2023 at 10:26 AM
Does NAPT follow PT plans created in the Customer Portal?
An organization can create a proficiency testing plan in their NAPT Customer Portal. Upon request, NAPT staff will assist in development of a proficiency te...
Wed, 1 Nov, 2023 at 2:17 PM
Why are my En calculations different from the values on your reports?
The En value can be different because the values used by you are not the values used by NAPT. Numbers found on the preliminary or final report are not the e...
Wed, 9 Feb, 2022 at 1:19 PM