Proficiency Testing & CRM Certification Support
Proficiency Testing & CRM Certification Support
Specialist technical support for proficiency testing providers and reference material producers—from program design and statistical evaluation to certification studies and quality system implementation.
ISO4LAB supports proficiency testing providers and reference material producers with the technical, statistical and quality-system activities required to develop reliable PT schemes and reference materials.
Our approach combines international standards with practical experience in study design, interlaboratory programs, statistical evaluation, homogeneity and stability assessment, value assignment, uncertainty estimation and technical reporting.
How We Can Support Your Organisation
PT Scheme Design & Implementation
Support with planning and developing proficiency testing schemes, including scheme objectives, participant requirements, test item preparation, assigned value approaches, performance criteria and reporting in accordance with ISO/IEC 17043 and relevant statistical guidance in ISO 13528.
PT Statistical Evaluation
Technical support with PT statistical design and evaluation, including assigned values, standard deviations for proficiency assessment, participant performance scores, robust statistics, outlier review and interpretation of PT results.
Reference Material Production & Certification
Support for planning and implementing reference material production and certification studies, including characterisation, value assignment, uncertainty estimation and technical documentation, in accordance with ISO 17034, ISO 33405 and other relevant standards and guides.
Homogeneity & Stability Studies
Design, statistical evaluation and interpretation of homogeneity and stability studies to demonstrate the suitability of PT items and reference materials and support certification decisions.
Proficiency Testing Support
ISO4LAB supports proficiency testing providers with the design, implementation and technical evaluation of PT schemes in accordance with ISO/IEC 17043 and the statistical principles and methods described in ISO 13528. Support may include:
Reference Material Production & Certification Support
Producing reliable reference materials requires appropriate planning, technically valid study designs and defensible statistical evaluation.
ISO4LAB supports reference material producers throughout the development and certification process, from initial planning through characterisation and certification.
Support may include:
Statistical Support for PT and Reference Materials
Statistical evaluation is central to both proficiency testing and reference material certification.
ISO4LAB provides specialist statistical support for complex datasets and study designs, helping organisations select appropriate methods, identify limitations and reach technically defensible conclusions.
A Practical Approach from Planning to Reporting
Define the Objective
Understand the PT scheme or reference material, intended use, technical requirements and project objectives.
Design the Study
Develop an appropriate technical and statistical design, including materials, participants, measurements and evaluation criteria.
Generate & Review Data
Review study data and assess data quality, completeness and technical suitability.
Statistical Evaluation
Apply appropriate statistical methods and evaluate the reliability and limitations of the results.
Technical Interpretation
Translate statistical outputs into technically defensible conclusions, assigned values, certified values or performance evaluations.
Reporting & Improvement
Prepare or review technical documentation and identify opportunities for future monitoring and improvement.
Practical PT & RM Expertise
Standards-Based
Support informed by ISO/IEC 17043, ISO 13528, ISO 17034, ISO 33405 and other relevant ISO 33400-series guidance.
Learn More ↗Statistical Expertise
Appropriate statistical approaches applied to complex PT, interlaboratory and reference material datasets.
Learn More ↗Technical Interpretation
A focus on understanding what the data mean—not simply producing statistical outputs.
Learn More ↗Flexible Support
Assistance ranging from individual statistical studies to broader PT or reference material system development.
Learn More ↗Need Support with Proficiency Testing or Reference Materials?
Whether you are developing a proficiency testing scheme, reviewing an existing PT program, producing a new reference material or evaluating certification data, ISO4LAB can provide specialist technical and statistical support tailored to your project.
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