<p>You prove it with BidLight&#39;s revision record: every publish is a versioned snapshot, and any two revisions compare element by element. You see exactly what moved, what was added and what was deleted, grouped by structural, MEP, envelope and interior. No digging through PDFs or chasing emails.</p> <p>When a change order comes up, pull the comparison. Show the owner the exact elements that changed, when they changed and which revision delivered them.</p> <p>That means fewer disputes and faster approvals. You stop absorbing the cost of someone else&#39;s revision.</p> <p>The same record helps you catch changes early. Issues are pinned to the affected elements and carry their sheet and revision, so you know when a duct moves instead of finding out weeks later at the coordination meeting.</p> <p>You walk in with a record you can defend, and that is how you get paid.</p>