Quality Assurance Program - Oregon Department Of Transportation Page 25
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28APPENDIX B
OREGON DEPARTMENT OF TRANSPORTATION
CONSTRUCTION SECTION
QUALITY ASSURANCE LABORATORY
PROFICIENCY SAMPLE PROGRAM
Proficiency sample testing is an additional factor used to evaluate the performance of a Quality
Assurance (QA) laboratory and the Quality Assurance (QA) laboratory technicians. It provides
information not otherwise available from the on-site laboratory inspection (Appendix A) and a
means of continued monitoring of testing personnel and testing equipment.
The ODOT
Construction Section requires QA Laboratories and QA laboratory technicians to participate in
this Proficiency Sample-testing Program. Participation includes testing all applicable samples,
which are to be distributed and completed within the specified time frame. The resulting data is
analyzed by the ODOT Quality Assurance Engineer.
Proficiency samples are distributed by Construction Section at annual intervals as outlined in the
Proficiency Sample Testing Plan in Table 1 of this Appendix. The Construction Section will
distribute a minimum of one set of samples from each material test method listed in Table 1 for
each of the QA laboratory technicians. The ODOT Central Laboratory and the QA laboratory
technicians will perform the required testing listed in Table 1 on each set of samples. The
distribution of proficiency samples is not intended to coincide with the on-site laboratory
inspection. Proficiency Sample test results will be submitted to the Quality Assurance Engineer
within 30 days of receipt of the sample. The results will tabulate all of the testing results from
the ODOT Central Laboratory and the QA laboratory technicians and statistically evaluate if any
of the technician results are more than two standard deviations beyond the grand average value
for each test method.
When a QA laboratory technician results are beyond two standard deviations of the grand
average values, the Quality Assurance Coordinator (QAC) shall investigate the reason for the
discrepancies and report the findings and actions taken to the ODOT Quality Assurance Engineer
(QAE) within thirty days of issuance of a final report. The QAE will determine whether or not
the findings warrant further action to address the testing deviations and identify steps that need to
be taken to ensure that the technician is correctly performing the test. The QAE will be
responsible for monitoring the technician testing results until there is confidence that the
technician is following approved procedures.
When an ODOT Central Lab technician results are beyond two standard deviations of the grand
average values, the ODOT Laboratory Services Manager shall investigate the reason for the
discrepancies and report the findings and actions taken to the ODOT Quality Assurance Engineer
(QAE) within thirty days of issuance of a final report. The QAE will address the testing
deviations, identify steps to be taken, and be responsible for monitoring results in the same
manner as for a QA laboratory technician.
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