Proficiency Testing Australia (PTA) is a subsidiary of the National Association of Testing Authorities, Australia.
For Testing Programs, a laboratory’s performance is normally a comparison to consensus values calculated from the results submitted.
For Calibration Programs, laboratory results are compared to values established by a reference laboratory, taking into account measurement uncertainties.
All information supplied by a laboratory as part of a proficiency testing program is treated as confidential.
PTA provides training courses and consultancy services on proficiency testing and statistical applications.