Modeling the deviation to improve the safety in aircraft piloting activities

This article is part of an experience feedback project for the improvement of flight safety. The work primarily consists in the development of a description language of pilot´s activity, in order to allow the modeling of piloting missions. This language aims 10 compare a reference activity (the envisaged mission) with the real activity (the actual mission). To do so, a calculus operator is created winch can express any deviation between two language descriptions. In order to interpret this result and with the aim of a systematic flight analysis, we establish a simple deviation typology between two piloting activities. As a result we obtain an unequivocal correspondence between a simple deviation and its typology interpretation.