<p>A 4-inch duct shift moves through BidLight as a tracked model change: it is captured in the next publish, shows up in the revision comparison, and any clash it creates gets pinned to the element.</p> <p>Here is the path:</p> <ul><li>Someone moves a 4-inch duct in Revit.</li><li>You publish from the model. The publish becomes a versioned snapshot with its own author and milestone.</li><li>Comparing that revision with the previous one shows the duct element by element, under the MEP category.</li><li>If it creates a clash or issue, the issue is pinned to the element and carries the sheet and revision it came from.</li><li>The owner sees it in the 6am digest. No long meeting to find out who moved what.</li><li>The issue closes with a screenshot, a tagged user and the linked model commit.</li></ul> <p>The win is knowing what the shift touches before it reaches the field. A clash caught in the model costs about $50. In the field, $5,000 to $50,000.</p> <p>Plans run from Basics at $260 per license per year to Max at $590. Enterprise is custom.</p>