The Surveying tool from within Estimating software allows you to survey against manufactured or completed Drawing files. The MAJ job file can be converted to use the rates from the original Estimate, therefore allowing judgment of each projects expenditure and analyse the true cost of manufacturing as opposed to what was original priced at tender stage.
The tender more often than not changes when proceeding 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 although they were costed at the time of tender stage.