Editing Metrology (section)

=== International Organization of Legal Metrology ===

The [[International Organization of Legal Metrology]] ({{langx|fr|Organisation Internationale de Métrologie Légale}}, or OIML), is an [[intergovernmental organization]] created in 1955 to promote the global harmonisation of the legal metrology procedures facilitating international trade.<ref>{{cite journal|title=Convention establishing an International Organisation of Legal Metrology|volume=2000 (E)|url=https://www.oiml.org/en/files/pdf_b/b001-e68.pdf|access-date=24 March 2017|publisher=Bureau International de Métrologie Légale|location=Paris|url-status=live|archive-url=https://web.archive.org/web/20140712233521/http://www.oiml.org/en/files/pdf_b/b001-e68.pdf|archive-date=12 July 2014}}</ref> This harmonisation of technical requirements, test procedures and test-report formats ensure confidence in measurements for trade and reduces the costs of discrepancies and measurement duplication.<ref name=strategy>{{cite journal|url = https://www.oiml.org/en/files/pdf_b/b015-e11.pdf|title = OIML Strategy|volume = OIML B 15|edition = 2011 (E)|publisher = Bureau International de Métrologie Légale|location = Paris|access-date = 24 March 2017|url-status = live|archive-url = https://web.archive.org/web/20161202233613/https://www.oiml.org/en/files/pdf_b/b015-e11.pdf|archive-date = 2 December 2016}}</ref> The OIML publishes a number of international reports in four categories:<ref name=strategy/>
*Recommendations: Model regulations to establish metrological characteristics and conformity of measuring instruments 
*Informative documents: To harmonise legal metrology
*Guidelines for the application of legal metrology
*Basic publications: Definitions of the operating rules of the OIML structure and system

Although the OIML has no legal authority to impose its recommendations and guidelines on its member countries, it provides a standardised legal framework for those countries to assist the development of appropriate, harmonised legislation for certification and calibration.<ref name=strategy/> OIML provides a mutual acceptance arrangement (MAA) for measuring instruments that are subject to legal metrological control, which upon approval allows the evaluation and test reports of the instrument to be accepted in all participating countries.<ref name="OIMLMAA">{{cite web|title=MAA certificates|url=https://www.oiml.org/en/certificates/maa-certificates|publisher=OIML|access-date=25 March 2018|language=en}}</ref> Issuing participants in the agreement issue MAA Type Evaluation Reports of MAA Certificates upon demonstration of compliance with ISO/IEC 17065 and a peer evaluation system to determine competency.<ref name="OIMLMAA"/> This ensures that certification of measuring devices in one country is compatible with the certification process in other participating countries, allowing the trade of the measuring devices and the products that rely on them.