Proficiency tests are trials that ensure the accuracy and reliability of results obtained by laboratories. To achieve this, laboratories must undergo rigorous quality controls, among which proficiency tests stand out. These tests allow evaluating technical performance and are a key requirement for accreditation under ISO 17025.
To do so, it is necessary to work with accredited providers such as GSC. For this reason, we offer specialized solutions so that laboratories meet the highest quality standards. Do you want to know in detail what proficiency tests are, their relevance, and how they can strengthen the competitiveness and credibility of laboratories? Join us.
What Are Proficiency Tests?
Proficiency tests consist of comparing results obtained by different laboratories when analyzing similar samples under controlled conditions. Their objective is to verify the technical competence of laboratories participating in the proficiency test. There are different types of proficiency tests, including:
Fitness Test
The fitness test primarily aims to evaluate the participating laboratory’s ability to obtain a consistent result against an assigned value. This type of test is regulated by ISO/IEC 17043:2023, which establishes the requirements for providers organizing these schemes.
Regarding the results obtained in this type of test, statistical indicators such as the Z-score, Z’-score, and En number are used, depending on the type of measurement and the parameter evaluated. These results allow judging whether the laboratory’s performance was satisfactory, questionable, or unsatisfactory.
Participation in fitness tests is mandatory for laboratories accredited under ISO/IEC 17025 in areas where suitable schemes are available. This is considered an essential requirement for maintaining demonstrated technical competence.
Collaborative Test
The collaborative test focuses on evaluating an analytical method, not the laboratory itself. In these studies, laboratories that are experts in the method to be evaluated participate. Its purpose is to determine characteristics such as reproducibility, repeatability, and method bias.
These tests are described in ISO 5725-3:2023, which provides guidelines for conducting interlaboratory studies to validate testing methods. The information obtained from collaborative tests is used to establish validation and robustness criteria for a method, allowing its future application in different laboratories under controlled conditions.
Unlike fitness tests, collaborative tests are not aimed at evaluating the individual performance of participating laboratories, but rather the quality of the method itself.
Material Certification Test
The purpose of the certification test is to ensure that materials comply with all regulatory requirements. With this certification, you can guarantee that you meet the necessary obligations.
Why Proficiency Tests Are Necessary for ISO 17025 Accreditation
For a laboratory to obtain and maintain ISO 17025 accreditation, it must demonstrate the reliability of its results through proficiency testing programs. Participation in these tests allows:
- Evaluate technical competence: Comparing results with other laboratories helps verify the accuracy and precision of analyses.
- Identify deviations: Detect errors in analytical methods and apply corrections to improve test quality.
- Meet regulatory requirements: ISO 17025 requires participation in proficiency tests as part of the laboratory’s continuous evaluation.
- Strengthen client confidence: A laboratory that participates in proficiency tests and obtains consistent results gains greater credibility among clients and stakeholders.
Benefits of Participating in Proficiency Tests
Laboratories that undergo proficiency tests can identify opportunities for improvement in their procedures and ensure that their results are reliable and reproducible.
Participation in proficiency tests allows laboratories to differentiate themselves in the market, demonstrating their commitment to excellence and compliance with international standards.
By comparing results with other laboratories, organizations can prevent systematic errors that could affect the validity of their measurements.
Additionally, proficiency tests provide valuable information to adjust work methods, equipment calibration, and staff training, improving operational efficiency.
How to Participate in Proficiency Tests with GSC
At GSC, as an accredited provider, we offer proficiency testing programs tailored to the needs of each laboratory. Our services include:
- Selection of appropriate programs according to the laboratory’s sector and specialty.
- Comprehensive management of participation in nationally and internationally recognized proficiency tests.
- Result analysis to implement improvements.
If you want to improve the reliability of your analyses and ensure compliance with ISO 17025, at GSC we guide you through every step of the process.
Proficiency tests are a fundamental tool for ensuring quality and accuracy in testing and calibration laboratories. Participation is not only a key requirement for ISO 17025 accreditation but also an opportunity to improve processes, reduce risks, and strengthen client confidence.
At GSC, we provide our expertise and specialized solutions to help your laboratory achieve the highest quality standards. Contact us and discover how we can help you optimize your performance through proficiency testing.
