<p>About 15 minutes, against the 90-minute meeting most teams hold to find out. The comparison itself is quick. The time goes into reading what moved and deciding who acts.</p> <p>In BidLight, every publish from Revit (or the federated model in Navisworks) is a versioned snapshot. Pick any two revisions and they compare element by element, broken down by category: structural, MEP, envelope and interior.</p> <ul><li>Publish the latest model.</li><li>Pick the revision you want to compare against.</li><li>Read the changes by category, starting with the ones that affect work in progress.</li><li>Pin an issue to anything that needs action and tag the owner.</li></ul> <p>Because the snapshot carries its own files, author and milestone, you also know who made the change and at what stage.</p> <p>Teams that reconcile versions by hand lose about 11 hours a week. Doing it from the record gives most of that back, and nobody has to remember what the file looked like last Tuesday.</p>