TestQual, already into force for 2022 proficiency tests:

·Will evaluate participants with z-score if the uncertainty of the assigned value is negligible.

·Will evaluate participants with z'-score if the uncertainty of the assigned value is NOT negligible.

·Will offer z-score with informative purposes if the uncertainty is too high (above a certain limit stablished in our procedure)

In all cases, if the PT meets the criteria from our technical annex (Method to obtain the assigned value, parameters and matrix within our scope), in all cases the evaluation will be offered accredited.

All protocols of 2022 proficiency tests have been updated, download the up-to-date revision in the applicable proficiency test page or contact with us. 

Contact data

If you wish to get a quote or if we can help you in any way you can contact us through:

Thank you for considering working with TestQual for your proficiency test participations. 

Written 20/Apr/22

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