To develop skills, this didactic approach tries to find ways of passage of the knowledges in the competence. For that purpose, a deductive approach installs a dialogue between six theoretical models (pedagogy, didactics, formation, management, socioconstructivism and cognitivism). At the same time, an inductive approach builds an experimental model (behavior, strategies and typology situationnelle), supported by a situationnel diagnosis. This diagnosis estimates and locates unforeseen in the working activity, with situationals parameters (individuals, facts, objects, places and moments). They are classified in invariants, variables and prodromes, according to criteria of existence, recurrence, concordance and causality. They also act as situationnels catalysts. The phenomenology of the unforeseen analyzes the situations, lived by professionals and students, resulting from artistic events (circus, dance, music and television) and surprises flagrante delictos of inference. Three theoretical concepts (procedural, ergologique and systematism) direct our reflexion throughout this double approach. The results of this research leans on observations, conversations and a questionnaire. Ways of passage exist through statistical links of convergence, divergence (experimental model), relevance (theoretical models) and coherence (all the models). A didactic congruence completes this relation between available knowledges and prescribed competences. It comes out from it a situational model and transferable didactics in a device of formation and for the prevention of the socioprofessional risks.
