Comprehensive Benefit Evaluation for Prefabricated Buildings Based on NSGA-II and Simulated Annealing Optimization Projection Pursuit Method

The market promotion process of prefabricated construction has been slow, and it is significant to clarify the comprehensive benefits to enhance the willingness of construction units to support and the market share of prefabricated buildings. An evaluation method for the comprehensive benefits of prefabricated buildings is proposed with prefabricated component components as the research object. Firstly, a comprehensive benefit indicator system is established from the perspectives of economic benefits, environmental benefits, and social benefits. Secondly, Quality Function Deployment and FAHP are used to establish a comprehensive benefit model for prefabricated component solutions. Finally, the NSGA-II and simulated annealing algorithm optimization projection pursuit method are applied to solve and evaluate the comprehensive benefit model, obtaining the optimal prefabricated component solution with the best comprehensive benefits. The results indicate that: (1) the optimal projection eigenvalue of the comprehensive benefit evaluation is 1.860, and applying this method to evaluate the comprehensive benefits of prefabricated buildings yields more comprehensive and objective results; (2) the best projection vector values are ENB ^{\mathrm {\ast }} (0.9944) > SB ^{\mathrm {\ast }} (0.9422) > EB ^{\mathrm {\ast }} (0.0272), indicating that environmental benefits have the greatest impact on the projection eigenvalue of comprehensive benefits, while economic benefits have the least impact; (3) there is a certain positive correlation between economic benefits and social benefits, while there is a certain negative correlation with environmental benefits.