To heads of verification and calibration laboratories

To assist laboratories in monitoring the reliability of performance results through participation in proficiency testing, provided by O’z DSt ISO / IEC 17025: 2019 “General requirements for the competence of testing and calibration laboratories” (p.7.7.2) and O’z DSt 3444: 2020 “General requirements for the competence of metrological services carrying out verification of measuring instruments” (clause 7.5), a working group for interlaboratory comparison tests was organized.

In accordance with the Package of Measures for the Organization of Proficiency Testing and Interlaboratory Comparisons for Laboratories, it is planned to conduct an analysis of the needs of comparison and calibration laboratories for the further development of proficiency testing programs and the organization of proficiency testing tours.

In this regard, we ask you to send your proposals for organizing proficiency testing tours based on the needs of laboratories in accordance with the attached forms to the addresses:,

We also invite laboratories interested in the development of the activities of proficiency testing providers in the republic, and planning to further provide services for the development and implementation of proficiency testing programs for laboratories of the republic, to participate in the activities of the working group on interlaboratory comparison tests.

For participation in the activities of the working group, please call:

+99871 202 00 11(1232)  Gulchekhra Ayupova SE «UzNIМ»