Building Information Modeling

With BIM, architects & engineers efficiently generate & exchange information, create digital representations of all stages of the building process, and simulate real-world performance – streamlining workflow, increasing productivity & improving quality.
The Building Information Model (BIM) is a new tool used by the architecture, engineering and construction (AEC) industry. The term Building Information Modeling (BIM) was coined by Autodesk to describe "3D, object-oriented, AEC-specific CAD" and popularized by Jerry Laiserin as a common naming for these capabilities offered by several technology providers such as Autodesk, Bentley Systems, Graphisoft, CADdetails and others – a digital representation of the building process to facilitate exchange and interoperability of information in digital format.

BIM covers geometry, spatial relationships, geographic information, quantities and properties of building components. BIM can be used to demonstrate the entire building lifecycle including the processes of construction and facility operation. Quantities and shared properties of materials can easily be extracted. Scopes of work can be isolated and defined. Systems, assemblies, and sequences are able to be shown in a relative scale with the entire facility or group of facilities.

BIM is able to achieve such improvements by modeling representations of the actual parts and pieces being used to build a building. This is a substantial shift from the traditional computer aided drafting method of drawing with vector file based lines that combine to represent objects.

The interoperability requirements of construction documents include the drawings, procurement details, environmental conditions, submittal processes and other specifications for building quality. It is anticipated by proponents that BIM can be utilized to bridge the information loss associated with handing a project from design team, to construction team and to building owner/operator, by allowing each group to add to and reference back to all information they acquire during their period of contribution the BIM model. For example, a building owner may find evidence of a leak in his building. Rather than exploring the physical building, he may turn to his BIM and see that a water valve is located in the suspect location. He could also have in the model the specific valve size, manufacturer, part number, and any other information ever researched in the past, pending adequate computing power.

BIM can greatly decrease errors made by design team members and the construction team by allowing the use of conflict detection where the computer actually informs team members about parts of the building in conflict or clashing, and through detailed computer visualization of each part in relation to the total building. As computers and software become more capable of handling more building information, this will become even more pronounced than it is in current design and construction projects. This error reduction is a great part of cost savings realized by all members of a project. Reduction in time required to complete construction directly contributes to the cost savings numbers as well.