The project to build a quality management system (QMS) began in 1998. Implementation and approval took place at the end of 2001. An external certification audit was carried out by the certification audit company ITQ in June 2002 and it was confirmed that the requirements of the EN STN ISO 9001: 2001 standard were met. The QMS was maintained and regularly assessed by control audits once a year in parallel with the internal audits carried out. The last certification by the ITQ audit company was carried out in July 2026 and the issued certificate is valid until August 2029.