Abstract
During the planning stage of a product, a thorough investigation of user needs is indispensable to ensure that the concept suits user tastes and have a high degree of usability. In this paper, concept developed method that combines the user needs extraction step and user needs structul step is proposed. This method includes three techniques : task analysis, evaluation of grid method, and questionuaire for weighting needs. These techniques can be carried out by the product designer, planner and so on. We will illustrate concept developed method and discuss a case in which the method was applied in the design of iron. The method was found to be effident in enabling the designer to extract and structure user needs.
