In this paper, we propose a prototype of a (collaborative) teleassistance system for mechanical repairs based on Augmented Reality (AR). This technology is generally used to implement specific assistance applications for users, which consist of providing all the information, known as augmentations, required to perform a task. For teletransmission applications, operators are equipped with a wearable computer and a technical support expert can accurately visualize what the operator sees thanks to the teletransmission of the corresponding video stream. Within the framework of remote communication, our aim is to foster collaboration, especially informal collaboration, between the operator and the expert in order to make teleassistance easier and more efficient. To do this we rely on classical repair technologies and on collaborative systems to introduce a new human-machine interaction: the Picking Outlining Adding interaction (POA interaction). With this new interaction paradigm, technical information is provided by directly Picking, Outlining and Adding information to an item in an operator's video stream.

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In this paper we shall present the T.A.C. (Télé-Assistance-Collaborative) system whose aim is to combine remote collaboration and industrial maintenance. T.A.C. enables the copresence of parties within the framework of a supervised maintenance task to be remotely "simulated" thanks to augmented reality (AR) and audio-video communication. To support such cooperation, we propose a simple way of interacting through our O.A.P. paradigm and AR goggles specially developed for the occasion. The handling of 3D items to reproduce gestures and an additional knowledge management tool (e-portfolio, feedback, etc) also enables this solution to satisfy the new needs of industry.

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