From the Implementation of an ERP to the Prisms of Extreme Situations and the Structurationist Theory: A Case Study in an Oil Industry 
The implementation of an ERP is understood as an extreme situation because it combines disruption, uncertainty and risk. We approach this question within the framework of the structurationist current, by mobilizing the Giddens’ model. We introduce the technical tool as a facilitator as an artefactual resource, in the register of domination. Based on a case study, we show that this model is relevant to account for the blockages in terms of the appropriation of an ERP, but inadequate to account for the learning of actors, in a context where informal dimension takes an important place.