Global ACI as an organisation is not a proficiency testing provider (PTP) and does not participate in or organise proficiency testing programs and inter-laboratory comparison tests.

The laboratories, and in some cases inspection bodies, that are assessed and accredited by the accreditation bodies that are members of Global ACI participate in proficiency testing as a requirement for maintaining their accreditation. Many of the accreditation bodies that are members of Global ACI accredit PTP and are a signatory to the Global ACI MRA for the accreditation of PTP using ISO/IEC 17043. These accreditation bodies will be able to provide the contact details for an accredited PTP for the PT programs you are interested in. The list of signatories to the Global ACI MRA is available here.

In addition, you can search the European Information System on Proficiency Testing Schemes EPTIS database of PT schemes.