Green Evaluation Of Electromechanical Product Based On Improved TOPSIS Method

Green product is the best choice to cope with the current ecological deterioration and energy crisis, which is the irreplaceable way of Sustainable Development. The green characteristics of electromechanical products are embodied in the various stages of the product life cycle. The improvement of products’ green degree lies in design of the elite staff and advanced technology and evaluation of the green product design. However, there is no standard and authoritative evaluation method until now.This thesis is designed to study the property of green products and multi life cycle theory and analyze the current product assessment of green products. Considering the flaws in the current in all the evaluate methods in index weights calculation and optimal selection, this paper puts forward the Improved TOPSIS (techniques for order preference by similarity to ideal solution) method, which is applied to the green evaluation of electromechanical and analysis of evaluation results. This main research work as follows:(1) Investigate the connotation, feature, multi life cycle theory of green product, and establish the comprehensive evaluation index system.(2) Study the index weight methods including AHP (analytic hierarchy process), entropy weight method and PC A (principal components analysis). These methods can be easily influenced by personal factors or special data, which can result in the big difference between index weight and the actual situation. Aiming at these shortcomings, this thesis provides the improved algorithm, making the index weight more reliable.(3) Discuss the optimal selection methods based on TOPSIS, including euclidean distance, angle measurement evaluation and vertical projection method. Bring the relative entropy into optimal selection in case of the failure of all above methods in some situations. Moreover, relative entropy has certain practical meaning, making the evaluation results more convincible.(4) Combine improved weight method and optimal selection method, apply the original method and developed method to evaluate the green car and make analysis to it.