It is one of the key requirements of ISO/IEC 17025:2017 standard for all testing and calibration laboratories to participate in proficiency testing to cover their scope of accreditation. Here are the few references from ISO/IEC 17025:2017 standard (Clause # 6.6.1, Clause # 7.7.2, Clause # 8.6.1.).
Any accreditation body (such as: NVLAP, NRC Canada, UKAS, A2LA, PJLA, ANAB, etc.) will not be able to complete the accreditation process and audit without reviewing your laboratories’ proficiency plan and result.

We co-ordinate between laboratories and conduct a proficiency testing study for each subdiscipline parameter (such as: Caliper, Multimeter, Force Gauge, Torque Wrench, pH Meter, etc.)

If you would like to participate in any one of the disciplines from you existing accreditation scope, please feel free to contact us for further details via email “info@callabaccess.com”.