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How well should laboratories perform in proficiency tests
1WRc, Frankland Road, Blagrove, Swindon, Wilts, UK SN5 8YF. gardner_mj@wrcplc.co.uk
Abstract:
The long-term performance of laboratories is examined using results from three proficiency testing programmes in the water and environmental monitoring sector. A medium term proficiency test pass rate of greater than approximately 75% is suggested as a minimum target for routine analysis to demonstrate fitness for purpose. This pass rate is proposed as a practical yardstick to be used by QA managers and accreditation bodies. This recommendation is contingent on a laboratory's continued and largely uninterrupted participation in a PT programme.
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