SiteSync: A Remote Real-Time Collaborative System for Early-Stage Site Analysis in Architecture, Engineering, and Construction

Early-stage remote site analysis is often hindered by fragmented media that fail to convey sufficient spatial context to off-site collaborators. To address this challenge, we propose SiteSync, a real-time remote collaborative system that combines live video, coarse mesh streaming, georeferenced pose tracking, and 3D spatial annotations to establish a shared spatial understanding between on-site and remote collaborators. The system was evaluated through a counterbalanced within-subject study with 24 participants, comparing the synchronous SiteSync workflow against a traditional asynchronous baseline. The results showed that SiteSync significantly improved task performance by reducing completion time and rework while increasing overall accuracy (all p < 0.001). Participants also reported lower cognitive workload and higher usability. Remote users benefited most significantly. These findings show that the synchronous workflow can improve collaboration efficiency and user experience in early-stage site analysis.