The competitive environment of companies triggers changes having impacts on the enterprise information system. In this context, Enterprise Architecture (EA) offers instruments to steer enterprises changes and to ensure cohesion and alignment between the different aspects of an enterprise. Despite considerable numbers of EA frameworks, there are not many giving importance to actors competencies supporting EA changes when modeling. In this paper, we present an approach based on competencies to support enterprises' changes. In doing so, we introduce a performance assessment method from the process modeling to the competence selection using a competence-oriented ontology. Moreover, we develop a prototype as an evaluation part of our work illustrated by a case study supporting EA decision making.

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