Building plans are two dimensional diagrams which forms the bridge for communication. Plans help engineers and architects to communicate with client and workers from different trade to build as per specifications. Traditionally, plans are drawn or printed on a piece of paper; although latest technologies allow us to make digital copies. Plans can help a client during maintenance of structure to locate critical points that are not visible from outside.
Softwares like Revit architecture, SketchUp, AutoCAD 3D etc. facilitate designers to communicate with 3D models which help in understanding the structure better. 3D drawing helps the client to visualise without imagination. Rendering the 3D models with realistic sun exposure, building materials and features allow clients and designers to make changes before the construction begins.