3.4. Intralaboratory Comparison  (Sub clause of terms and definitions)

Organization , perfomance and evaluation of the measurement or tests on the same or similar items within the same Laboratories in accordance with predetermined condition.

In the context of ISO/IEC 17025, the Intralaboratory Comparison sub-clause typically states that:

“The laboratory shall conduct intralaboratory comparisons to:

  • Ensure the consistency and reliability of its test and calibration results
  • Evaluate the performance of its measurement methods and equipment
  • Identify and correct any bias or variation in its results
  • Ensure that results are consistent across different personnel, equipment, and locations
  • Maintain and improve its technical competence

The laboratory shall:

  • Conduct intralaboratory comparisons regularly, as defined in its quality management system
  • Use the results of intralaboratory comparisons to identify and correct any issues or deviations
  • Document and record the results of intralaboratory comparisons, including any corrective actions taken
  • Ensure that personnel involved in intralaboratory comparisons are trained and competent
  • Use intralaboratory comparisons to evaluate and improve its quality management system”

This sub-clause aims to ensure that laboratories:

  1. Ensure consistency and reliability of test and calibration results
  2. Evaluate performance of measurement methods and equipment
  3. Identify and correct bias or variation in results
  4. Ensure results are consistent across different personnel, equipment, and locations
  5. Maintain and improve technical competence

By including this sub-clause, laboratories demonstrate their commitment to:

  1. Quality assurance
  2. Technical competence
  3. Continuous improvement
  4. Consistency and reliability of test results
  5. 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 consistent, reliable, and accurate.

More: 3.5.Proficiency Testing ( Sub clause of terms and definitions)