<p>Every export is versioned and compared element by element, so you see exactly what moved between the version that got signed off and the version in the model now. That is the check. Not a side-by-side PDF read, not a two-hour meeting trying to remember who touched what.</p> <p>How to run it:</p> <ol><li>Publish the signed-off model from Revit or the federated model from Navisworks. That export gets versioned.</li><li>When the model changes, publish again. BidLight diffs the two versions element by element.</li><li>Read the diff. You get the changes, not a wall of geometry to eyeball. About 15 minutes instead of a 90-minute meeting.</li><li>Open the issues tied to those elements. Each one is pinned to the element it concerns.</li><li>Close an issue only with proof: a screenshot, a tagged user, and the model commit that fixed it. Signed off means signed off, and you can show it.</li><li>Check the 6am digest. Every owner sees what they own, so nothing slips between versions.</li></ol> <p>Why it matters on the job: a clash caught in the model costs about $50. The same one found in the field costs $5,000 to $50,000. And a clash sitting unresolved can burn $15K to $50K a week in idle field labour.</p>