## 5 Conclusions  
This article regards the safety performance evaluation and path decision-making of prefabricated construction as a complex system and proposes a performance evaluation and improvement path method based on DEMATEL and NK. A performance evaluation index system was constructed through grounded theory, and DEMATEL was used to analyze causal relationships, identify key performance evaluation indicators, and conduct NK model simulation of key indicator fitness to explore the optimal improvement path, providing reference for safety performance management in prefabricated construction. At the same time, the practical application scenarios and shortcomings of the research results in this article were summarized. 1. Through survey interviews, policy review, and literature analysis, a total of 386 pieces of raw data were obtained. Using grounded theory, substantive coding and saturation testing were performed on the raw data, combining the opinions and suggestions of field experts and the experience of relevant practitioners. This ultimately formed the prefabricated building construction safety performance indicator system with 16 main categories (\(X_{1}\) to \(X_{16}\)) and four core categories (personnel, management, environment, and equipment). Figure 2: Improvement path of key safety performance indicators in PBC. Based on the DEMATEL decision matrix causal relationship analysis, \(X_{6}\) (construction and implementation of safety management systems) has the highest influence on other factors, while \(X_{14}\) (quality and safety status of prefabricated components) is the most influenced by other indicators. From the perspectives of centrality and causality, \(X_{6}\) (construction and implementation of safety management systems), \(X_{1}\) (personnel safety awareness and attitude), \(X_{14}\) (quality and safety status of prefabricated components), and \(X_{12}\) (construction site working environment) are the top four performance indicators and should be focused on in the improvement path selection for prefabricated building construction safety performance. 3. Based on the NK model simulation analysis, key subjects were modeled for four key indicators, constructing an adaptive three-dimensional landscape climbing schematic. According to the landscape climbing process representation and the overall fitness value criteria for alleles, the optimal path for improving prefabricated building construction safety performance was determined, focusing on \(X_{6}\) (construction and implementation of safety management systems) \(\to X_{1}\) (personnel safety awareness and attitude) \(\to X_{14}\) (quality and safety status of prefabricated components) \(\to X_{12}\) (construction site working environment). 4. To simplify the study, the NK model in this paper only considers two scenarios (0 and 1), lacking consideration of intermediate degrees, which affects the reasonable allocation of resources for safety performance improvement strategies to some extent. In the future, introducing intermediate degree values in the range of (0,1) or adopting a graded representation of state degrees to take reasonable resource allocation based on the optimal degree of implementation of each key indicator will be attempted, thereby obtaining the optimal performance improvement of prefabricated building construction safety performance under reasonable resource allocation. 5. At the same time, this study focuses on practical issues encountered during the construction process of a certain subway line in Wuhan. It can be said that the complete method framework system formed by this research provides a certain reference for other similar engineering projects to solve the same problems. However, there are certain particularities in case samples, basic data, etc. Therefore, in solving problems in other engineering projects, specific problem analysis should be carried out. Conceptualization, Z.X., Y.L., W.Y., J.Z. and K.Z. ; methodology, Z.X., Y.L., W.Y., J.Z. and K.Z. ; software, Z.X., Y.L., W.Y., J.Z. and K.Z.