Method of participatory interaction based on user classification
                                                   ZHONG Jia ji1, HU Lei2, SUN Qi zong1, HUA Er tian1
（1.College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2.School of Computer and Information Engineering, Zhejiang Gongshang University, Hangzhou 310018, China）

Abstract: Aiming at reducing the discrepancy between product design and market will， the screening value of online co mments on products and the data processin g modes were investigated， and the method of participatory interaction based on user classification was proposed. The validity of users online co mments were analyzed according to the data objects， then the critical product attributes for users  requirement expression were selected. The users professionalism was calculated and classified based on the critical product attributes and the online co mments. The feedback mechanisms of online interaction were established according to the different users  professionalism. Motivate users to propose improvement reco mmendations combined with their experiences and transforming into feasible design solutions. The proposed method was tested by utilizing sport utility vehicle as an example. The results indicate that this method can classify users with different professionalism and decompose requirements of complex design objectives， hence the user engagement and market specificity of product design were improved.

Key words: user participation; product design method; professionalism; online interaction