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Yves MORTUREUX: Ponts et Chaussées civil engineer - Expert in operational safety for SNCF's Operating Systems and Safety Division - Vice-Chairman of the Institute for Dependability
INTRODUCTION
Preliminary risk analysis (PRA) is a process designed to assess the problems to be solved in terms of risk control. The PRA method is dedicated to this approach.
This approach can take very different forms depending on the technical field or industrial sector under consideration. In many cases, a preliminary risk analysis uses methods that are better known in the later phases of risk analysis, such as the fault tree (cf. article ), FMEA(C) (analysis of failure modes, their effects and their criticalities, see article Operating safety: methods for controlling risks in the treatise L'entreprise industrielle) or reliability block diagrams. But a special method has also been developed for this initial phase of preliminary risk analysis. This is known as the APR method. The confusion of terms is total, and the confusion of notions is to be avoided: let's just say that an APR approach is not necessarily carried out using the APR method.
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