INTEGRATION OF 4D BIM AND VR FOR INTERACTIVE MODULAR BUILDING MANUFACTURING SIMULATIONS IN A FACTORY-CONTROLLED ENVIRONMENT

The manufacturing of modular buildings in factory-controlled environments is complex process, involving intricate task sequencing, resource allocation, and rigorous quality control.Traditional visualization and scheduling methods frequently fail to communicate these complexities effectively, resulting in inefficiencies, scheduling errors, and cost overruns.This research addresses these challenges by integrating Building Information Modelling (BIM) and Virtual Reality (VR) into a unified, interactive 4D simulation environment to enhance user comprehension, enable real-time interaction, and optimize modular construction workflows.A comprehensive 4D BIMVR system is developed that synchronizes detailed 3D BIM models with timebased scheduling data, creating an immersive environment for interactive visualization and dynamic task management.The system was evaluated through user testing in a modular building manufacturing setting, with participants completing a survey to provide feedback on their VR experience.Survey results showed high satisfaction with visual realism, metadata accessibility, and workflow clarity.Users noted that the immersive environment improved their understanding of complex sequences, enabled earlier detection of scheduling conflicts, and enhanced overall planning efficiency, demonstrating the system's potential to optimize modular construction processes.The primary contribution of this research is the advancement of modular construction methodologies through immersive digital technologies, establishing a robust foundation for future innovation in digital construction practices.