关键词: 产品设计, 需求获取, 需求建模

Abstract: The product requirements exist in all stages of product lifecycle and are the objectives of design activities after identified and decomposed definitely. The methodology of product requirements capturing based on the investigation of information and related activities of customer requirements， product development processes and application systems is studied， to connect the product and its design system and to capture the information of product development processes and its related requirements. A formalized way for product requirements modeling which based on product structure and product development processes is proposed. The relationship of product， product requirement and design activities is established. Then a proposed product requirement model is given， which is described by the EXPRESS-G formal graphical notation.

Key words: product development, product requirements capturing