Any difference in a proficiency test result proven to be the consequence of an analytical or interpretative discrepancy may prohibit the personnel who produced the discrepant result from further examination of case evidence until the cause of the discrepancy is identified and corrected. The quality assurance coordinator or designated personnel will determine the need to audit prior cases according to established laboratory policy.
Before resuming analysis or interpretation of casework, one additional proficiency test should be successfully completed by the personnel responsible for the discrepancy.
The results of all proficiency tests should be maintained by the laboratory according to established laboratory policy.