Abstract:

：The existing product design is mainly based on function, which focuses on the structure to achieve the function. However, the function of the product can’t completely reflect all requirements of product design, design requirements which shouldn't be expressed by function usually expressed by “affordance”. A lot of design show that evolution of the product is mainly the change of affordance and the main function of it essentially unchanged. Based on the theory of affordance and Substance-field analysis, the method of enhancing the quality of the product design based on “substance-field affordance” model(SFAM) in product conceptual design stage is proposed in the article. The SFAM is integrated in the conceptual design of product which is designed currently based on function, in addition, “the entity interaction matrix” be used to analysis the positive and negative interactions of product design solution and the product principle solution can be optimized after maximizing positive interactions and minimizing negative interactions of product, the quality of product design accordingly can be enhanced. Finally, the tea plucking machine is used as an example to verify the effectiveness of the proposed method.

Key words: conceptual design, quality of the product design, substance-field affordance model, tea plucking machine, affordance