RESEARCH ON EVALUATION METHOD OF PRODUCT GREEN DEGREE BASED ON LAYERED GREY RELATION

To evaluate product green degree more objectively, Product process is divided into three aspects of resources, product life cycle and castoff according to the multi-layered and multi-factored features of product green degree and tree structure of the three aspects is constructed. The evaluation index system composed of technical, economical and environmental factors is established. The layered grey relational analysis method of product green degree is put forward. The relational coefficients of subsystem and whole system are computed based on grey relational model. The evaluation factors are normalized dimensionally and the values of the factors are obtained, consequently the weighted relational values are computed. The product green degrees are improved according to the index values. The green degree of electrical dust catcher is evaluated, the evaluated results indicate that the evaluation method of layered grey relational analysis is objective, accurate and highly operable.