<p>You stop a missed spec change from turning into rework by comparing each revision against the last one, so the change shows up whether or not anyone announced it.</p> <p>The job that goes wrong is the one where the design changed after the field was told. A wall shifts, a finish swaps or a duct reroutes, and the issued set still shows the old version. Nobody updates every tab, so the crew builds the wrong thing and you argue about a change order.</p> <ul><li>Publish from Revit or Navisworks after each change. Each snapshot has its own author and milestone.</li><li>Compare it with the previous revision and read the differences by category.</li><li>Pin an issue to each changed element so it carries the sheet and revision.</li><li>Assign an owner and let the 6am digest chase them.</li><li>Close it only with a screenshot, a tagged user and the model commit.</li></ul> <p>A clash caught in the model costs about $50, against $5,000 to $50,000 in the field.</p>