Green Cooperation Strategy of Prefabricated Building Supply Chain Based on Smart Construction Management Platform

Green technological innovation in the prefabricated building supply chain (PBSC) is an important way to realize the sustainable development of the construction industry. However, the competitive environment and the green input costs reduce the willingness of PBSC firms to improve the green technology level. This paper constructs a PBSC consisting of a smart construction management platform (SCMP), a contractor, and prefabricated-component manufacturers (PCMs) to explore green cooperation strategies in the PBSC. Stackelberg game models are constructed and the green technology level and PBSC profit under different cooperation strategies are examined. The study shows that the optimal service commission of the SCMP increases with the cost parameter of green technology and the intensity of competition between PCMs. However, the green technology level decreases with the competition. The integration strategy does not necessarily achieve the highest level of green technology. The horizontal cooperation among competing PCMs is not conducive to improving the green technology level, but PCMs always have incentives to form horizontal cooperative alliances to achieve Pareto improvement under certain conditions. For the SCMP, the vertical cooperation strategy with PCMs is the most favorable, but for the PBSC, the system profit under the integration strategy is the most profitable. This study enriches the theoretical foundation of the PBSC and provides theoretical guidance for green cooperation strategies in PBSCs.