Jean Renaud ; Rémy Houssin, Mikaël Gardoni, Negar Armaghan
International Journal of Industrial Ergonomics, 71, pp. 75-93

In classical design methods, intuitive consideration is given to how the product, or the system that is the subject of the design, is used. How the product is used is defined in a product manual. It is taken into account in the final phase of the techno-centric process, which leads not only to modifications of the late design phases, but also to difficulties using the product. Product manual also helps businesses save significant staff training and customer service costs. Anthropocentric methods are rarely used by the general public, and are in fact too expensive. We propose to take product use into account by integrating behavioral analyses (the behavior of the product and of its user) with functional analyses. This will allow us to set out instructions for using the product right at the design stage. An analysis of techno- and anthropocentric approaches is presented in this work in a bid to position our approach. Next, a functional and behavioral analysis is proposed based on a car seat case study. The proposed method also calls for a phase dedicated to the collection of product use information and data on user feedback or legislatives data. These analyses are carried out using the QFD method in order to assist the designer in structuring knowledge, taking into account the functions of the product, the characteristics or criteria of its use, and the points to be developed when drawing up operating instructions.