Research on green assessment method of AHP-EWM prefabricated building based on DEMATEL optimization

In view of the problem that the current evaluation of prefabricated buildings in China focuses more on the "assembly rate", this paper puts forward a green assessment method suitable for prefabricated buildings in China, which determines the evaluation index system according to four aspects: green design, intelligent construction, assembled building quality and comprehensive benefit. In addition, the DEMATEL method is used to optimize the index weight, and then the AHP-EWM (Analytic Hierarchy Process-Entropy weight method) method is used to determine the weight of the index system, and the evaluation index set is quantified and graded. Finally, taking Hutuo village public rental housing project in Xi'an city of Shaanxi Province as an example, this paper uses the evaluation method to conduct a green assessment, and gives suggestions for improvement in each stage of the project.