Ensuring long-term MMR performance
Risk management measures – Performance criteria

The Safety Management System (SMS) defines the process for ensuring that MMR performance is maintained over time. For all operating modes, the SMS must define :

• identification of MMR ;

• technical barrier management (purchase, installation, upkeep and maintenance);

• feedback from experience;

• change management.

For risk control measures involving safety instrumentation (MMRI), the industry has proposed the principles of a methodology aimed at preventing their ageing in Guide DT 93 (Guide méthodologique pour la gestion et la maîtrise du vieillissement des mesures de maîtrise des risques instrumentées (MMRI) – July 2011 – UIC/UFIP). One of the aspects addressed in this guide concerns the monitoring and justification of performance criteria associated with MMRIs.