Modular construction

I am working to develop an impact analysis for a mixed use development that incorporates an affordable housing component. To achieve the necessary efficiencies to be able to build the structures in a cost effective way to allow for lower rents the developer is proposing to use an off-site building process, using a vendor in another state. Once the major components of the homes are complete the will be shipped to the site and pieced together, similiar to a modular deisgned home. I am wondering how I can evaluate the construction impact if some of the activies are taking place off site.