This paper presents a new object-oriented generic model that, together with a new method, supports speci cation of product needs and mapping of in uencing surrounding factors. The goal of the method is that individuals involved shall be able to handle and view more information related to concept selection and thereby be able to make more accurate decisions. A direct link to downstream product testing and the possibility to highlight con icting criteria at an early stage is also desirable. The model is applicable both for new design and re-design tasks. It has, however, so far only been tested in re-design of an existing product, and it has been developed while collecting information about that particular problem. Speci cation handling of today often results in large and 'hard-to-grasp' quantities of paper documents. The research goal in this work has been to create a speci cation model for the future, which will be handled by computer tools and provides relevant information to the right user at the right time. Its has been implemented using the commercial METIS Software (NCR Metis, 1995).