This paper deals with an adaptive guidance system for software processes. The aim is to define an approach of process modeling with a recursive adaptation of the guidance. This one is specifically adapted to the developer model through its role and its qualification, and in relation to the activity model associated with the context of the activity in progress. This guidance system is provided on the basis on the choice criteria like the suitable access mode, the assistance function to be ensured and the object of assistance to be considered. The description of the suggested approach is done using the modeling formalism SPEM extended by new concepts and principles dedicated to the modeling of the adaptive guidance.