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ISO 17025 NABL

National Accreditation Board For Testing & Calibration Laboratories


ISO 17025 is the equivalent of ISO 9000 for calibration and testing laboratories. It applies to any organization that wants to assure its customers of precision, accuracy and repeatability of results. This includes in-house laboratories for which assurance of results is at a premium. The growth in use of quality systems generally has increased the need to ensure that laboratories that form part of larger organizations or offer other services can operate to a quality system that is seen as compliant with ISO 9000 as well as with ISO 17025. Testing and calibration labs that comply with this standard will also operate in accordance with ISO 9000. Certification to ISO 9000 alone does not demonstrate the competence of the lab to produce technically valid data and results, whereas certification to ISO 17025 does provide that evidence. Reporting the uncertainty qualifies the accuracy of the measurement and aids understanding when results from different labs are compared. The ratio of specification-to-calibration uncertainty is one way that equipment users gauge their confidence in a product's performance. ISO/IEC 17025 is a recently introduced standard from the International Organization for Standardization and the International Electro technical Commission. "ISO17025", as it has become known, replaces a number of older standards and guides including ISO/IEC Guide 25, EN45001 and ANSI/NCSL-Z540. It is a global standard for the technical competence of calibration and testing laboratories. In addition to establishing quality system, documentation and personnel requirements, it directs calibration labs to analyze the uncertainty of each measurement, incorporate the uncertainty into the test procedure and/or test limits and to provide the uncertainties with the calibration certificate and results.

  Provides additional information about the quality of each measurement  made  during the calibration / testing process
  Enables assessment of relative quality and capability of different calibration /  testing laboratories
  Enables easy comparison of measurement expertise from different  calibration  suppliers
  Enables easy comparison of suppliers in different countries
  Eliminates the need for supplier auditing - calibration suppliers independently  verified through the accreditation process