<p>Send the live model because a PDF freezes one version and hides every change after it. When somebody moves a duct, the PDF you sent is already out of date, and you are the one explaining why the drawings do not match.</p> <p>BidLight keeps one live record of the project inside Revit and Navisworks. You publish straight from the model or the federated model. Every publish is a versioned snapshot, and any two revisions compare element by element.</p> <p>Here is what that looks like week to week:</p> <ul><li>Publish from Revit or Navisworks after each change.</li><li>Compare the new revision with the last and see what moved, by category.</li><li>Pin issues to the affected elements, with the sheet and revision attached.</li><li>Let the 6am digest put each issue in front of its owner.</li></ul> <p>You stop arguing about which file is current. You show it. Plans run from $260 to $590 per license per year, with unlimited projects.</p>