The Surveying tool in ESTmep lets you survey against manufactured or completed drawing files. The MAJ job file can be converted to use the rates from the original estimate. This lets you analyze each project's expenditure and analyse the true cost of manufacturing, as opposed to what was original priced at the tender stage.
More often than not, the tender changes when proceeding on to manufacture. Additional runs may have been introduced or changes to where the duct maneuvers due to structural presence. Surveying allows for the drawing or manufactured job to be costed with the same rates of the estimate. Any new fittings that exist in the drawing but not in the estimate will maintain their overhead percentages as though they were costed at the time of tender stage.