Building Information Modeling (BIM) creates a 3D digital model of the building containing information about all components. The model is used by all trades (architectural, structural, MEP) to coordinate their work. Clash detection identifies conflicts before construction (e.g., pipes crossing beams, ductwork interfering with structure). Resolving clashes in the model prevents costly on-site rework. Sequencing in the model shows how work phases proceed. The model helps visualize the construction sequence and identify potential conflicts. Coordination meetings review the model and resolve issues. Fabrication drawings are generated from the BIM model. Fabrication shops use these drawings to manufacture components. Accuracy of the BIM model is critical; errors in the model propagate to fabrication. MEP systems are modeled in detail allowing routing optimization. Ductwork, piping, and electrical distribution are routed to avoid conflicts. Congested areas are identified and alternate routing considered. Construction sequencing from BIM improves efficiency. The model shows what must be constructed in what order. On-site installation can follow the logical sequence reducing rework. Site planning using BIM optimizes equipment placement. Temporary roads, storage areas, and construction facilities are positioned for efficiency. Safety hazards can be identified in the model. The model shows visibility, work at heights, and other hazards. Worker training using the model improves understanding of their role. Virtual walkthroughs allow workers to understand the sequence.