When applicable, our modeling practices to generally align with accepted guidelines such as AIA’s BIM Level of Development (LOD).
But, did you know specifying a LOD will not always appropriate communicate the characteristics you want to include in your model?
For example, in renovation projects, it is standard practice to deviate from the actual as-is representation. Walls are modeled as right angles even though they meet at a 92º angle in the real world. Structures behind walls cannot be determined, imperfections are often not modeled, and new construction BIM details (i.e. parametric, time, or lifecycle information) would not be relevant to a renovation project.
So, how should you convey what you need in your model?
After you talk through the level of detail, it is a good idea to discuss which scope elements you need. Do you only want structural elements? Is it important to have electrical finishes and plumbing fixtures? Are you working on a historic building where ornamentation and decorative details also need be included? Elements can be included or excluded based on project intent.
Using our renovation example, defining the modeling characteristics is often helpful. For instance, there are various techniques in representing casework features. Sometimes an accurate size and basic shape will do the job and other times cabinets, trim/hardware, and materials are also needed.