<p>BidLight catches model changes by comparing each publish with the last, so a change shows up whether or not anyone announced it.</p> <p>Change a wall assembly, swap a finish or resize a room, and the differences list element by element. No rebuilding the history from email, no forgotten change quietly wrong on site.</p> <p>How it works in practice:</p> <ul><li>Publish your Revit model, or the federated model in Navisworks. Each publish is a versioned snapshot.</li><li>Compare any two revisions, grouped by structural, MEP, envelope and interior.</li><li>Keep working in Revit as usual. Make value engineering and client revisions where you already work.</li><li>Pin issues to the changed elements. They carry the sheet and revision.</li><li>Review the changes in about 15 minutes before they reach the field.</li></ul> <p>When your record tracks the model, you stop chasing scattered updates. A clash caught in the model costs about $50, against $5,000 to $50,000 in the field.</p>