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DEFINITION BIM covers geometry, spatial relationships, geographic information, quantities and properties of building components (for example manufacturers' details). BIM can be used to demonstrate the entire building of construction and facility operation. Quantities and shared properties of materials can easil. == lifecycle == including the processes 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. The American Institute of Architects has further defined BIM as "a model-based technology linked with a database of project information", and this reflects the general reliance on database technology as the foundation. In the future, structured text documents such as specifications may be able to be searched and linked to regional, national, and international standards. ANTICIPATED FUTURE POTENTIAL While BIM is currently employed by professionals on many of the most complex new buildings BIM: Who's doing it ., BIM design method is currently young in its development. BIM provides the potential for a virtual information model to be handed from Design Team (Architects, Surveyors, Civil Engineers, Structural Engineers, Mechanical Engineers, Electrical Engineers) to Contractor and Subcontractors and then to Owner, each adding their own additional discipline-specific knowledge and tracking of changes to the single model. The result is anticipated to greatly reduce the information loss that occurs when a new team takes "ownership" of the project as well as in delivering extensive information to owners of complex structures far beyond that which they are currently accustomed to having. BIM can greatly decrease errors made by design team members and the construction team (Contractors and Subcontractors) 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. NATIONAL BUILDING INFORMATION MODELING STANDARD The first National Standard for Building Information Modeling (NBIMS) is being written by Institute of Building Sciences (NIBS). The standard will create a standardized method for the data to be formatted that will allow all the users of building information models to be able to easily utilize the information, establish minimum requirements that are implied when marketing BIM, as well as many other benefits to all. BUILDING INFORMATION MODELING SOFTWARE
CONTRACTORS The Associated General Contractors and contracting firms also have developed a variety of working definition of BIM which describe it generally as "an object-oriented building development tool that utilizes 5-D modeling concepts, information technology and software interoperability to design, construct and operate a building project, as well as communicate its details" BIM Forum and bim(x) . Although the concept of BIM and relevant processes are being explored by contractors, architects and developers alike, the term itself is under debate Discussion of the BIM Acronym , and it is yet to be seen whether it will win over alternatives, which include:
BIM is often associated with IFCs ()-approved CIS/2 standard, a non proprietary standard with its roots in the UK. Proponents claim that BIM offers: #Improved visualization #Improved productivity due to easy retrieval of information #Increased coordination of construction documents #Embedding and linking of vital information such as vendors for specific materials, location of details and quantities required for estimation and tendering #Increased speed of delivery #Reduced costs In August 2004 the US National Institute of Standards and Technology ( NIST ) issued a report entitled "Cost Analysis of Inadequate Interoperability in the U.S. Capital Facilities Industry" ( NIST GCR 04-867 (PDF) , which came to the conclusion that, as a conservative estimate, $15.8 billion is lost annually by the U.S. capital facilities industry resulting from inadequate interoperability due to "the highly fragmented nature of the industry, the industry’s continued paperbased business practices, a lack of standardization, and inconsistent technology adoption among stakeholders". Green Building XML is an emerging schema, a subset of the the Building Information Modeling efforts, focused on Green building design and operation. REFERENCES " (Mis)Understanding BIM " by BIM Consultant, Nigel Davies of Evolve Consultancy The Future of the Building Information Model 5D – Integrating Pricing and Supply Chain by H. Edward Goldberg AIA, NCARB SEE ALSO EXTERNAL LINKS
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