is formal third-party recognition by an authoritative body of a laboratory's competence, both to work to specified standards and to carry out specific tasks that are defined in the scope of the . The laboratory’s management and quality systems are assessed during the process, as is the laboratory's technical competence to carry out the specific tasks. The main standard used for accrediting calibration and laboratories globally is ISO/IEC : General requirements for the competence of and calibration laboratories.

Calibration Laboratories: Electro-Technical, Mechanical, Pressure, Thermal .

ISO/IEC enables laboratories to demonstrate that they operate competently and generate valid results, thereby promoting confidence in their work both nationally and around the world.

It also helps facilitate cooperation between laboratories and other bodies by generating wider acceptance of results between countries. Test reports and certificates can be accepted from one country to another without the need for further , which, in turn, improves international trade.