LOD 100 - Conceptual Design and Master Planning, creating mass models for the concept stage. Volumes, height, location and orientation, basic building analysis etc. This model can be quickly and easily be analyzed for energy consumption to help make design changes and approval for design options.
LOD 200 - Schematic Design/Design Development. Developing the general assemblies, rough sizes and placement of rooms etc. Here you have the general idea on the design but do not have the specific information on exact wall assemblies or component types. This LOD is typically the basis for the working drawings.
LOD 400 – Fabrication and Assembly typically not achieved by the Designer or Architect as this level of detail is typically required by fabricators, for example manufacturers of RTU's would detail their components at this level for fabrication of their components.
LOD 500 - As Built Model, Maintenance and Operations, the final level of detail that represents the true building. Ideally used for building operations and maintenance. Typically includes extensive information within the model on each component, for example a light fixture may have the wattage, warrantee information, the suppliers contact info, model number etc…
Model Elements: Model Elements represent building component, system or assemblies within a building or building site.
Model Element Author: The party responsible for developing the content of the specific model. To the Level of Detail required by the particular phase of the project.
Model User: this refers to any authorized individual or company who may use the model. For example someone doing a quantity take off, scheduling, analysis?
Now with BIM were adding more information to our drawings by adding more information to our Building Information Model. For the majority of us the end result is a set of documents that someone can build from. Don't lose sight of that, we are in danger of Over Modeling....
Try to use families that are smaller in file size this will help your project file size to stay manageable.