Participation in and performance on proficiency testing external quality assessment) is monitored on an on-going basis. Laboratories holding accreditation certificates must participate in formal interlaboratory comparison schemes, where available and appropriate, for all examinations included in the scope of accreditation.
Formal interlaboratory comparison (PT/EQA) schemes that are acceptable to QMP-LS meet these criteria:
- must provide challenges of undisclosed assay value or content;
- must provide evaluation of the laboratory performance on submitted results, e.g. provide comparison of results for like methods and different methods with a score and/or judgement of performance; and
- must provide a minimum of four sample challenges in a 12-month period. It is the responsibility of the laboratory director to ensure that the testing schedule adequately challenges test performance.
Providers known to QMP-LS that meet the above criteria for at least some of their programs are listed in this document.. Dowload the PDF 
Contact the provider regarding the individual program of interest, in order to determine that it meets the above criteria.
Additional providers may qualify, if you would like to submit an additional provider program, please contact ola@qmpls.org.
2011-05-06