<p>A late door change costs more on site because by then other trades have built around it. The door itself is a small item. The framing, rough-in and finishes that moved with it are the expensive part.</p> <p>New hardware, a fire rating or a different frame changes more than the door. Labour gets pulled off other tasks to fix it. The original design was never wrong. It just stopped matching the model.</p> <p>BidLight keeps the record tied to the model:</p> <ul><li>Every publish from Revit is a versioned snapshot.</li><li>Compare two revisions and the changed door shows up with the elements around it.</li><li>Issues pin to those elements, with the sheet and revision attached.</li><li>Owners see their items in the 6am digest.</li></ul> <p>That is the whole gap. Caught in the model, the fix costs about $50. Found on site, the same clash costs $5,000 to $50,000, plus the idle labour behind it.</p>