<p>It costs hours and rework, because the design moves ahead while nobody can say what changed until a meeting catches up. Teams lose about 11 hours a week working out which model version is current.</p> <p>BidLight puts the record on the model as you work. It runs inside Revit and Navisworks. Every publish becomes a versioned snapshot with its own files, author and milestone, and any two revisions compare element by element.</p> <ul><li>You see what changed in about 15 minutes instead of a 90-minute meeting.</li><li>Issues pin to the elements and carry the sheet and revision they came from.</li><li>Owners see theirs in the 6am digest.</li><li>Closing an issue needs a screenshot, a tagged user and the linked model commit.</li></ul> <p>Without that, you rebuild the history from email threads and 47 versions of the same markup, and the clash you miss costs $5,000 to $50,000 in the field instead of about $50 in the model.</p>