BIM is a new approach to designing, implementing, and maintaining facilities. It's data. As opposed to designing a building on drawings, it uses data. All the information on the building is stored in a data software, and then you can apply different technologies to do energy analysis, to do designs, to do conflict resolution between different elements of the building to make the construction more efficient, and to store data in regard to the maintenance—the requirements for different equipment, as well as the preventive maintenance programs.
It is a very integrated and very exciting new technology.