The current industrial situation, highly competitive, requires companies to innovate in order to sustain their business. This innovation can be achieved through the development of products incorporating new disciplines such as ergonomics and industrial design, as part of a multidisciplinaire.Cependant design trades associated with these new disciplines are regularly faced with complex cooperation with other part of the business of mechanical design. In this context, the research problem addressed concerns the definition and development of an interdisciplinary methodological approach in the design process of products. Are studied in particular the links between trades that are ergonomics, industrial design and design mécanique.Une global multidisciplinary design methodology, including the specifics of each business and their interactions is proposed. It is tested in the context of experiments conducted on design projects of urban furniture. Further formalizations used by each business study, as well as interactions observed during projects have highlighted issues stages convergence.Sur this, new tools to help convergence based in particular on Virtual Reality technology (VR) are provided for a better management of these phases involve different professions. Two experiments, conducted on a project to design a city car and a job, helped set concrete situation developed tools and demonstrate their relevance in the process of multidisciplinary convergence. However, the results also showed the need to structure the phases of convergence in the framework of a methodology spécifique.Une formalized multidisciplinary methodology convergence is finally proposed. It results in a generic convergence procedure, adapted to the disciplines ergonomics, industrial design and mechanical design. It can work in the different phases of the process, the various trades involved and the different design contexts. We introduce a mapping aids to convergence, classified according to an appropriate type. Thus, our contribution allows design teams have appropriate new solutions in order to promote the phases of multidisciplinary convergence.
