AXIO | Proficiency Testing schemes 2025
WHAT ARE THE BENEFITS OF PT PARTICIPATION? • Identifying measurement or test problems • Comparing methods or procedures • Comparing operator capabilities • Comparing analytical systems • Improving performance • Verification of method performance • Educating staff • Instilling confidence • Assessing measurement uncertainty • PT test items as internal quality controls
WHAT SHOULD I CONSIDER WHEN INTERPRETING PT RESULTS? Putting performance into wider context • The overall results in the round • Measurement or test method performance • Test item factors • Bimodal result distribution • PT scheme factors Trends in PT performance • Performance over time • Common groups of properties
• Performance of methods • Performance of analysts PT performance errors
• Non-analytical errors – transcription, units, format, calculations • Analytical errors – calibration, methodology, property, sample extraction/clean-up, test items, analyst
ACCREDITATION & PT Proficiency Testing (PT) is a requirement for accreditation to ISO/IEC 17025 and ISO 15189. Using an accredited PT provider gives you assurance in the quality and reliability of the service. LGC is a UKAS (United Kingdom Accreditation Service) accredited proficiency testing provider (ISO/IEC 17043) No. 0001. In addition, we are certified to ISO 9001. The most up-to-date sample data can be found in the Scheme Descriptions and Application Forms.
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