The question of the role of each partner and the integration of the different approaches is dealt with via two design projects. The evolution of user interfaces is expressed by the increased importance of pictures shown in the form of graphics, pictograms, icons, metaphors, animations, use of 3D. These new interfaces raise specific questions of design. Pictures, more than text, evoke the aesthetics and imagination to the cultural universe of users.
Pictures are also more polysemic than text.
The purpose of this paper is to discuss the cooperation between these partners within a design team. It is not possible to present the process of each project in this communication. We have preferred to outline a few key points of the collaboration which seem of most importance to us. If certain elements of the interface are treated more specifically by a partner, pictures are nevertheless handled differently by all the partners with their differing points of view. He will therefore watch if the user easily pinpoints the function with respect to the icon.