Building information modeling (BIM) is a process that uses computer-generated models to manage building data. The models can be used for a variety of purposes, including construction planning, facility management, and energy analysis. BIM can be used to create a virtual model of a building before it is constructed. This allows for better coordination between the different trades involved in the construction process, and can help to avoid potential construction problems. BIM can also be used to create a virtual model of an existing building. This can be used for facility management, to help plan for renovations or repairs, or to analyze the energy performance of the building.