BIM is not a software - it's a process. It means creating and managing a building's information digitally throughout its entire lifecycle: design, documentation, construction, and operation. At the center of a BIM workflow is a 3D model where every element carries data - not just geometry. A wall isn't just a shape; it has a material, a fire rating, a cost, and a thermal value. That data travels with the model from the architect's desk to the contractor's site to the facility manager's dashboard.