Research on Decision-Making of Supply Chain Scheme of Prefabricated Buildings Based on the Grey Target Theory to Achieve Sustainability

Scientific decision-making of design plans is the key factor in ensuring the sustainable construction and operation of prefabricated buildings. The complexity and uncertainty are major challenges. Therefore, a novel design decision-making indicator system and of supply chain scheme of prefabricated buildings were proposed. Firstly, an indicator system was constructed from the resistance and the resilience to solve the complexity of decision-making of supply chain scheme of prefabricated buildings. Secondly, a decision-making model based on the structure entropy weight method and the grey target theory was developed. Finally, a prefabricated building in Nanchang, China was selected for an empirical research. The results showed that resistance was the most important factor affecting the decision-making of supply chain scheme. The scheme ranking calculated in this paper was consistent with the actual situation, demonstrating the scientific and effective nature of this research. Through comparative studies with other decision-making methods, the novelty was emphasized. The research findings are of great practical significance for improving the sustainability of green building projects.