Companies that operate technical systems, e.g. the German gas transmission system operator ONTRAS Gastransport GmbH, must ensure operational safety at all times, that all associated procedures and processes comply with the applicable laws and regulations, and that the company is also prepared to react in case of emergencies. Haphazard trial and error might be a possibility to achieve this. However, considering that the methods used should fit process control as well as legal requirements, some kind of organised management system featuring concrete steps in a predefined order is necessary. A practicle example is the QM System of ONTRAS.