What is the difference between verification and validation in ISO 17025

In the field of laboratory testing and calibration, it is essential to ensure that accurate and reliable results are provided to customers. This process involves two key activities: verification and validation. Although they may seem similar, verification and validation serve different purposes and have distinct requirements.

Verification

Verification refers to the process of ensuring that the instruments or equipment used for testing or calibration perform according to predefined specifications. It focuses on assessing the accuracy and precision of the measurement system itself. Verification activities include calibrating the equipment, comparing its measurements with a reference standard, and verifying that it meets specific performance criteria.

Validation

Validation, on the other hand, validates the entire testing or calibration method, not just the measurement system. It aims to confirm that the methods used produce reliable and accurate results. Validation activities involve evaluating the test method's ability to measure the intended properties, establishing appropriate acceptance criteria, and conducting experiments to demonstrate the method's effectiveness.

The Key Differences

The main difference between verification and validation lies in their scope and focus. Verification primarily concerns the instrument or equipment used for measurement, while validation encompasses the entire test method. Verification ensures the reliability of the equipment, while validation ensures the reliability of the test process as a whole.

Additionally, the timing of these activities differs. Verification typically occurs before any testing or calibration takes place. It is performed as part of the initial setup and maintenance procedures. On the other hand, validation is an ongoing process that includes periodic checks to ensure continued effectiveness and accuracy.

Both verification and validation are crucial elements of a quality management system in accordance with ISO 17025. They help ensure the accuracy and reliability of laboratory testing and calibration processes. By implementing these activities, laboratories can provide confident results to their customers, ultimately enhancing their reputation and customer satisfaction.