<p>That swap is where most teams lose the money. A beam size moves on Tuesday, the takeoff still shows the old tonnage, the steel package quotes the old weight, the connection detail stays drawn for the old depth, and the labor hours never get recalculated. Nobody decided any of that. It just happened.</p> <p>Because BidLight runs inside Revit and Navisworks, the export is versioned and diffed element by element. You see what changed against the last export, not what changed since someone remembered to save a copy. Then the number follows the geometry: labor, equipment, material, time, current pricing from the database plus Craftsman, 1Build and RSMeans. No re-running a takeoff by hand.</p> <p>What to do at the swap:<br/>1. Publish from the model so the change is captured.<br/>2. Open the diff and confirm the beam is the only element that moved.<br/>3. Let the BOQ reclassify, two AI models reading geometry and metadata at 86%.<br/>4. Check the labor and steel package totals on the updated estimate.<br/>5. Send the version to the GC before the coordination call.</p> <p>A PDF bid is a stale bid. You want the version that is current right now.</p>