LOD or LOL
Level of Development or Lots of Lines (Alix and Cindy, feel free to use that "line").
Maybe, BIM Level of Difficulty?
Ladies and gentlemen, this is one of the most important and "this will kick you in the ass if you don't pay attention" aspects of BIM. Even if you don't fill out the survey, you'd better study this, especially if you're a subcontractor.