2. What is the criticality matrix?
2.1 Principle
The method consists of three steps:
positioning accident scenarios in a criticality matrix without taking into account the existence of the RIS whose required SIL level is being assessed;
use the acceptability criteria to determine the minimum reduction factor needed to move the scenario into an acceptable or tolerable risk class;
deduce the minimum SIL level required for the RIS from the reduction factor.
The choice of criticality matrix is free. For example, the criticality matrix presented in the circular dated May 10, 2010 could be used.
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What is the criticality matrix?
Bibliography
Also in our database
Bibliography
Olivier Iddir – Principle for assessing the probability of failure of risk control measures. [SE 4 057] - Safety and risk management (2009).
Olivier Iddir – The LOPA method: Principles. [SE 4 075] - Safety and risk management (2012).
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