2. The FH is often faced with several assumptions

The notion of FH still conveys a number of preconceived ideas, which distort company managers' perceptions and give them the wrong idea of what they can expect from intervention in this field.

• It is very difficult to quantify human failures a priori

This probabilistic quantification has been developed over the past decades in the nuclear and petrochemical industries. Several methods have been developed, including that of Swain, one of the main instigators of this approach . His methodology makes it possible to estimate the probability of human failure during an intervention....