" We chose the quality because the luck had become too expensive. " (Jean Abraham) " In the running in the quality, there is no finishing line. " (David Kearns) " The quality is never an accident; it is always the result of an intelligent effort. " (John Ruskin)

The law of habituation to danger implies that one must be vigilant, in particular at the time of the modifications considered as a minor process which functioned without accident during a long period. The difficulty of choice between a less heavy, less systematic and less exhaustive method and a more rigorous and more predictive method is to be underlined.