This document deals with business processes performed by two or more trade partners. Companies expect many benefits from the integration of such processes: cost reduction, better access to their customers and suppliers, and even more flexible types of interactions. However, the integration of inter-organizational processes is an expensive and risky process. If information technologies can support several integration types in an organisation, the implications (costs, risks) and potential benefits vary according to the level of integration targeted. Moreover, inter-organizational integration brings out the question of the identity of the firm, along with its frontier. Consequently, several questions arise. Among them: What are the effects of inter-organizational collaboration on the organizational structures? Which organizational structure will best support the development of this type of collaboration?