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Proficiency Testing and Reference Material Services

Verify your laboratory’s performance with an independent eye. Prove the reliability of your test results internationally with accredited proficiency tests and certified reference materials in accordance with ISO/IEC 17043 in cooperation with DRRR GmbH.

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What is a Proficiency Test?

Proficiency testing is a performance verification method that enables laboratories to assess the accuracy of test and measurement results comparatively through independent organizations. Conducted in accordance with EN ISO/IEC 17043, these tests are not only a compliance requirement for accredited laboratories, but also a strategic tool for method development, staff development and risk management.

USB Certification serves as the official distributor of Deutsches Referenzbüro für Ringversuche und Referenzmaterialien (DRRR GmbH) in Türkiye, Saudi Arabia, Romania, United Arab Emirates and Bulgaria. DRRR is a proficiency testing provider with DAkkS and A2LA accreditations.

Verification of Laboratory Performance

Proficiency testing allows you to prove the accuracy of your laboratory’s test results through independent third-party assessment.

Certified Reference Materials

Validate your test methods and secure your calibration processes with certified reference materials from DRRR GmbH.

International Accreditation Compliance

It enables laboratories operating under ISO/IEC 17025 to meet accreditation and legal requirements.

Benefits of Proficiency Tests

Proficiency testing is not just a compliance check, but a strategic tool to continuously improve your laboratory’s technical competence, personnel and methods.

It independently verifies the technical performance of your laboratory and demonstrates your technical competence to your management team and external stakeholders. It is a critical tool to prove your performance before accreditation bodies and regulatory authorities.

Detect potential deviations in test and measurement processes early on and compare the performance of different methods and procedures. With the resulting data, you can improve method accuracy and precision on a data-driven basis.

Compare the measurement capabilities of different operators against objective criteria. The results are a direct input for identifying training needs, planning competency development programs and embedding a culture of continuous improvement.

For your customers and external stakeholders, you have objective documentation proving the reliability of laboratory results. This strengthens your reputation both in your business relationships and in processes with public authorities.

It adds an additional layer of risk control to your laboratory’s quality management system. Feedback from proficiency test results provides valuable input for root cause analysis, corrective actions and reference material generation.

Bring Your Laboratory to International Standards…

Get free preliminary information about the 2025/2026 DRRR proficiency tests catalog and reference material programs from our experts.

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1
Food, Feed and Beverages
2
Consumer Goods and
Packaging
3
Textile, Leather and
Personal Protective Equipment
4
Medical Devices and
Material Testing
5
Building Materials and
Environmental Analysis
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PFAS, Pesticides and
Mineral Oil Tests
PROFICIENCY TEST PROGRAMS

Wide Coverage with 1,100+ Test Programs

The approximately 1,100 different proficiency testing programs we offer in cooperation with DRRR meet the laboratory needs of different sectors and methods under one roof. In particular, our PFAS and pesticide testing programs are constantly being expanded in line with current analysis technologies.

Reference Material Provider Service

RELIABLE SOLUTIONS FOR ACCURACY and CALIBRATION

Certified reference materials are critical for your laboratories to validate test results and calibrate your analyzers with confidence. The reference materials we offer in collaboration with DRRR GmbH have been specially developed for many industries such as food, beverage, consumer goods, textiles, construction and environment.

Using certified reference materials directly contributes to increasing test reliability, proving methodological accuracy, standardizing your results, improving your calibration processes and meeting regulatory/accreditation requirements.

Qualification Test Participation Process

A systematic six-step process is carried out through the ODIN online platform, starting from selecting the appropriate test program, sample analysis, reporting of results and performance evaluation.

  • 1
    Program Selection

    Determining the test program suitable for the scope of your laboratory from the ODIN online catalog

  • 2
    Registration and Contract

    Filling out the proficiency test registration form and clarifying the conditions of participation

  • 3
    Sample Submission

    Safe transportation of test samples to DRRR laboratories

  • 4
    Analysis and Result Entry

    The laboratory conducts the analysis with its own method and uploads the results to ODIN

  • 5
    Statistical Evaluation

    z-score and statistical performance analysis of results according to ISO 13528

  • 6
    Report and Certificate of Participation

    Preparation of the performance report and delivery of the certificate of attendance

Proficiency Tests

Catalog and Documents

Environmental testing and EMC Proficiency Testing 2025
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Medical Devices Product Catalogue 2025
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Textiles | Leather | PPE Proficiency Testing 2025
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Environmental Analytics Product Catalogue 2025
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Building materials Proficiency Testing 2025
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Consumer Goods with Body Contact Proficiency Testing 2025
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Consumer goods and Packaging Product Catalogue 2025
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Food and Feed Product Catalogue 2025
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Material Testing Product Catalogue 2025
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Per- and polyfluorinated compounds (PFAS) Proficiency Testing 2025
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Mineral oil Proficiency Testing 2025
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Thermoplastics and metals Proficiency Testing 2025
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Frequently Asked Questions

Proficiency testing is a performance evaluation method in which the results of tests or measurements performed by laboratories on the same sample are compared by an independent provider using statistical methods. It is conducted in accordance with EN ISO/IEC 17043 standard. You can contact USB Certification to select the appropriate program for your laboratory.

Deutsches Referenzbüro für Ringversuche und Referenzmaterialien (DRRR GmbH) is a proficiency testing provider and reference material manufacturer based in Germany. It is accredited by DAkkS and A2LA. USB Certification is the official distributor of DRRR in Türkiye, Saudi Arabia, Romania, United Arab Emirates and Bulgaria. For more information, please contact USB Certification.

Our 2025/2026 ODIN catalog includes around 1,100 different programs in areas such as food and feed, consumer products and packaging, medical devices, materials testing, textiles/leather/KKD, building materials, environmental analysis, EMC testing, PFAS and pesticide testing, mineral oil testing. You can get consultancy from USB Certification to determine the appropriate programs for the scope of your laboratory together.

ODIN is DRRR’s online platform for managing proficiency testing. Program selection, registration, result entry and report downloading are carried out through ODIN. You can access the user guide in the documents section and contact USB Certification for platform access and installation support.

Certified reference materials are used for validation of laboratory test methods, calibration of analyzers, internal quality control processes and measurement uncertainty calculations. We offer a broad portfolio for different matrices and analyte types. Contact USB Certification for the right reference materials for your needs.

The results are evaluated with statistical parameters such as z-score and zeta-score in accordance with ISO 13528 standard. The performance report includes the laboratory’s position among all participants, deviation analysis and areas for improvement. USB Certification offers expert support for report interpretation and corrective action planning.