Current problem facing industry 
As illustrated above the problem currently facing the building services industry is demonstrated by a design consultant using proprietary software and a contractor receiving a 2D - PDF drawing in which the contractor will have to redraft and undertake detailing, fabrication and installation which is not effective.
Three BIM workflows form the basis of the BIM-MEPAUS WORKFLOWS and, in part, define the environment in which the models must operate:
In assessing the various workflow models, the following key points are noted: