Global risks analysis (GRA)

This article deals with global risk analysis (GRA), which covers the identification, assessment and management of structural, functional and situational risks throughout the life cycle of the system under study, from the start of its design to the end of its dismantling.

It exists in a semi-qualitative version (AGR), presented in this article, and in a quantitative or probabilistic version (AGRq) .

AGR can be applied to project, business or product risk analysis.

The four generic hazard categories considered are :

• hazards outside the system ;

• dangers related to system governance ;

• hazards related to the system's technical resources ;

• hazards related to system design and production.

The aim of AGR is :

• identify the main risks during system operation, based on hazards, hazardous situations, dreaded events or consequential accidents and their consequences;

• characterize accident scenarios on the basis of the three risk factors: exposure factor, triggering factor and aggravating factor;

• draw up risk maps;

• identify major risks;

• evaluate the effort/loss balance in financial terms;

• draw up a risk reduction action plan;

• create a catalog of security parameters for subsequent security activities.

In addition, AGR takes into account the financial management of risk treatment, and enables the allocation of performance and safety risk objectives (operating safety allocations).