LOD 100: Modeled elements are at a conceptual point of development. Information can be conveyed with massing forms, written narratives, and 2D symbols.

LOD 200: Modeled elements have approximate relationships to quantities, size, location, and orientation. Some information may still be conveyed with written narratives.

LOD 300: Modeled elements are explained in terms of specific systems, quantities, size, shape, location, and orientation.

LOD 400: Continuation of LOD 300 with enough information added to facilitate fabrication, assembly, and installation.

LOD 500: Modeled elements are representative of as installed conditions and can be utilized for ongoing facilities management.