Building Information Modeling (BIM) is very powerful, but it does come with a price. Higher levels of model development mean more time involved in creating that detail, and someone has to pay for that time.
The AIA Document E202 (by the American Institute of Architects) is the Building Information Modeling Protocol Exhibit and assigns the specific responsibility for the various project team members in developing model elements to specific levels of development for project phases. This contract document is extremely important in legally determining how the model is developed and who is responsible for different parts of the BIM file. This document is not to be taken lightly and has dramatic impact on both the profitability of the project and liability of the project team members.