Proficiency Testing Schemes (Round Robin) are services aimed at evaluating the performance of calibration and testing laboratories through interlaboratory comparisons. The laboratory participation in a proficiency test is one of the most efficient ways to evaluate its technical competence, as it allows comparison in the same field, establishing a benchmarking. In a broad context, a proficiency test enables the participating laboratory to:

• Continuous assessment and your performace monitoring;
• Evidence or confirmation of achievement of reliable results;
• Identification of problems/errors related to the performed tests/analyzes;
• Taking corrective and preventive actions and evaluation of internal controls that the laboratory has;
• Determination of performance characteristics, validation of methods;
• Standardization / adequacy of methodologies to the market and recognition of results nationally and internationally;

Proficiency tests and interlaboratory comparisons are key to credibility enhancement of measurement results and, consequently, they contribute to the improvement of international trade and the prevention of technical barriers. ITAK´s proficiency tests are globally accepted, with the current participation of companies from over 30 countries.

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