From imprecise actions to imprecise preference modelling : the case of non orders

This study deals with imprecise preference modelling. It is based on a set of vague actions on which choices are operated by actors whose discriminating power is not precise. Indeed, the information being imprecise, the actors have but limited and relatively indeterminate knowledge of the basis of their preferences. This results in vague preferences the expression of which are the structures of imprecise preference (imprecise non orders) and the particular ones of relatively indeterminate preference (relatively indeterminate non orders). The shift from the former structures to the latter corresponds to a process of preference maturation and decision structuration inspite of an imprecise con…