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Supporting efficient simultaneous engineering activities involves convenient "assistant" processes. The main improvements rely on reusing abilities, collaborative work design and information sharing.To achieve these goals, the support system must include storing and descriptive features as well as on-line adaptation to each actor. Of course, this system must also be organised in a distributed way and include communication features.The architecture presented in this paper relies on a hypermedia based information system. This system includes, in a semi-structured way, all the information describing the products and the description of the project organisation thanks to the LACATRE and SDL formalisms. Secured access functions are provided to ensure information consistency and allow collaborative work.By adding an information status controlling the information cycle of life and an eavesdrop system on the information access functions, we approximate the way the project is effectively organised.Thanks to this last feature, actors are described not only according to a technical point of view but also according to an organisational point of view. In this way, more adapted assistants could be proposed to the different actors Linear

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No abstract