I would like to emphasize above all the fact that mobilization and the hope of achievement are primary among the actors of the work. The investment as well as the motivation have a vital character. In the strict sense, the subject's identity, health and life are at stake. The incompressible variation between prescribed work and real work reminds us that the evaluation of work is paradoxical and not very objective. It requires a continuous analysis and cannot do without questioning. During my investigations at the SNCF or in the hospital sector, the feeling of injustice linked to the lack of recognition interferes with the mental health of employees, whatever their status. This is because the logic of competence is essentially based on procedural legitimacy, as opposed to symbolic legitimacy, which structures qualification on the basis of consensus. In this context, the competence logic and its managerial rationalization are gradually overtaking the old evaluation model. But the major risk observed is that individuals are subjected over time to the diktat of productivity, to the detriment of work groups and the links forged with social partners.