Research on Collaborative Mechanisms and Efficiency in Construction Project Supply Chains Driven by Shared Digital Platforms

Addressing the issue of inconsistent application outcomes for shared digital platforms in construction projects, this study aims to uncover the intrinsic relationship and underlying mechanisms linking platform usage to project success. A multidimensional mediation model was constructed, encompassing 'platform usage-collaborative mechanisms-project effectiveness'. Empirical analysis was conducted on 300 valid questionnaires from frontline project managers, with mediating effects verified using the SPSS PROCESS macro. Findings indicate: Firstly, differentiated platform usage patterns exert distinct effects on collaborative mechanisms. Collaborative usage significantly fosters cross-organizational trust and interactive memory, whereas instrumental usage primarily enhances workflow integration. Secondly, three collaborative mechanisms play pivotal mediating roles between platform usage and project effectiveness. Specifically, platforms deliver value through three pathways: 1) Collaborative usage elevates stakeholder satisfaction by cultivating cross-organizational trust; 2) Collaborative use enhances project innovation and adaptability by establishing cross-organizational interactive memory; 3) Instrumental use safeguards project efficiency and quality by strengthening workflow integration. This study reveals the intrinsic link between platform empowerment and project success, demonstrating that how a platform is used matters more than whether it is used at all. Furthermore, relational, cognitive, and process mechanisms serve as the critical bridge connecting technology and effectiveness.