Building information modelling (BIM) is a 3-dimensional tool that depicts the physical representation of a building and all its systems. In addition to the visual 3D aspects, BIM stores data and information about each individual part of an assembly. This allows the user to pull information directly from the model, while providing an accurate visual representation of the end product. BIM proactively identifies clashes/interferences between disciplines, effectively reducing potential field re-work and cost overruns. As changes occur, models are updated in real-time for both design and construction personnel coordination, keeping projects on schedule and within budget.