The Level of Development (LOD) Specification is a reference that enables practitioners in the AEC Industry to specify and articulate with a high level of clarity the content and reliability of Building Information Models (BIMs) at various stages in the design and construction process. The LOD Specification utilizes the basic LOD definitions developed by the AIA for the AIA G202-2013 Building Information Modeling Protocol Form and is organized by CSI Uniformat 2010. It defines and illustrates characteristics of model elements of different building systems at different Levels of Development. This clear articulation allows model authors to define what their models can be relied on for, and allows downstream users to clearly understand the usability and the limitations of models they are receiving.
The intent of the Specification is to help explain the LOD framework and standardize its use so that it becomes more useful as a communication tool. It does not prescribe what Levels of Development are to be reached at what point in a project but leaves the specification of the model progression to the user of this document. To accomplish the document’s intent, its primary objectives are:
- To help teams, including owners, to specify BIM deliverables and to get a clear picture of what will be included in a BIM deliverable
- To help design managers explain to their teams the information and detail that needs to be provided at various points in the design process
- To provide a standard that can be referenced by contracts and BIM execution plans
About the BIMForum
The BIMForum’s mission is to facilitate and accelerate the adoption of building information modeling (BIM) in the AEC industry. We will lead by example and synchronize with counterparts in all sectors of the industry to jointly develop best practice for virtual design and construction (VDC). We will share our experiences and execute our goals via online forums, highly useful deliverables and practical industry conferences. We will revolutionize the building industry.
Although the BIMForum operates as a unified group, chaired by John Tocci of Tocci Building Corporation, ten subforums have been established to address each relevant industry sector and topic. These subforums collaborate with each other and other industry organizations (AIA, NIBS, NIST, IAI, C3T, 3xPT, CURT, etc.) on interdisciplinary projects to accelerate the adoption of BIM.