Organization , perfomance and evaluation of the measurement or tests on the same or similar items by two or more laboratories in accordance with predetermined condition.
In the context of ISO/IEC 17025, the Interlaboratory Comparison sub-clause typically states that:
“The laboratory shall participate in interlaboratory comparisons, also known as proficiency testing, to:
- Demonstrate the accuracy and reliability of its test and calibration results
- Compare its performance with other laboratories
- Identify areas for improvement
- Ensure the validity of its measurement methods
- Maintain and improve its technical competence
The laboratory shall:
- Participate in interlaboratory comparisons at least once a year, or as required by the relevant standard or regulatory body
- Use the results of interlaboratory comparisons to identify and correct any bias or variation in its test and calibration results
- Document and record the results of interlaboratory comparisons, including any corrective actions taken
- Ensure that personnel involved in interlaboratory comparisons are trained and competent
- Use interlaboratory comparisons to evaluate and improve its quality management system”
This sub-clause aims to ensure that laboratories:
- Demonstrate the accuracy and reliability of their test and calibration results
- Compare their performance with other laboratories
- Identify areas for improvement
- Ensure the validity of their measurement methods
- Maintain and improve their technical competence
By including this sub-clause, laboratories demonstrate their commitment to:
- Quality assurance
- Technical competence
- Continuous improvement
- Accuracy and reliability of test results
- Compliance with ISO/IEC 17025 requirements
This sub-clause is essential to ensure that laboratories maintain the highest standards of quality and technical competence, and that their test and calibration results are accurate, reliable, and comparable with other laboratories.
More: 3.4. Intralaboratory Comparison (Sub clause of terms and definitions)