When starting an estimate you can make a checklist from the specification and go through the checklist while you are doing the takeoff. When you are done with the takeoff you can compare the items that you have checked off of the list with the estimate and see where any holes in the documents might be. Also you can identify items that are on the drawings that might not be in the specifications.
This it just one easy way to reduce missed items or duplications in your estimate!
