In accordance with the Design Science percepts, the authors present in this paper an approach that aims to give a holistic unifying framework that ensures consistency and coherence between the existing IT governance approaches and mechanisms. It considers the advances and best practices suggested by COBIT ITIL, etc. Therefore, it proposes an operational implementation and instantiation of information system of IT governance based on SOA architecture. It meets the requirements posed by gaps in the research on IT governance, which have been proven by the literature study. as well as the managerial problems highlighted by a two-year in-depth case study conducted inside one of the largest telecommunication operators in Europe. The relevance and feasibility of this approach have been proven by the implementation of this approach in a another two-year in-depth action research case study inside another large European telecommunications operator.
