The identification and choice of a suitable risk assessment model has been considered as a crucial issue for decades. In fact, the concern for safety in industrial activities, both inside the establishments and in the surroundings, has a long history. As a result, many laws and regulations apply. The use of risk assessment techniques is fairly widespread in policy and regulations. Current available risk analysis techniques are well adapted to industry needs since they were developed for its purpose. Risk assessment is a necessary step in the management of risk. Increasing safety is often difficult, especially when you have already obtained good of results, so the aim of our paper is the proposal of a new methodological approach called SIRA - Safety Improve Risk Assessment to assess the risk by defining an index called Total Risk Priority Number Index – TRPN. The index proposed is based on the Improved Risk Priority Number – IRPN and the Analytic Network Process – ANP, a Multi Criteria Decision Making – MCDM analysis tool.
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