Levels of Development (LOD) refer to a standardized framework for defining the amount of detail and accuracy that should be included in a building information model (BIM) at different stages of a project. The details in a building model grow more refined at each level. ...
from the bim forum version 2013. it is saying in most of electrical & mechanical equipments to refer to fundamental lod definition, which says in case of lod 300: the model element is graphically represented within the model as a specific system, object or assembly in terms of quanti...