4.2. BIM and Prebid
Typically the data that is transferred among the project teams during the prebid phase of a project is a combination of PDFs, scan files (TIF, JPG, and BMP), CAD drawings, and paper documentation. As a project nears bid day, the estimator is responsible for making sure that the information that they are quantifying (PDFs or CAD drawings) is the latest set of documentation. They then rely heavily on the specifications to clarify the scope of work, degree of finish, material type, and quantity to verify with the subcontractors what is included in their price as they bid or are working toward issuing a GMP or budget. It is not uncommon for estimators to have to make assumptions on a scope of work because of incomplete construction ...
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