<p>A 2-inch move becomes costly when nobody flags it in time and the clash reaches the field. Work waits, the coordination meeting stalls, and a fix that would cost about $50 in the model ends up costing $5,000 to $50,000 on site.</p> <p>Spreadsheets do not fix that. You need a record that catches the shift when it happens. BidLight saves every publish as a versioned snapshot and compares any two revisions element by element. A duct moves two inches, and you can see who changed it and when without calling a meeting.</p> <p>Issues are pinned to the elements they concern and carry the sheet and revision they came from, so you find the one you need in seconds instead of searching your inbox. By 6am you get a digest of the issues assigned to you.</p> <p>Catch the change in the model and the crew keeps working. You can see it on your own project at bidlight.com.</p>