The magic is in three letters: .

You run the test. Red spheres explode at every intersection. A steel column runs straight through a HVAC duct. A cable tray blocks an access hatch. Each clash is a conversation waiting to happen. Each resolution is money saved before concrete is poured.

Quantification? It extracts takeoffs from the federated model automatically. Linear feet of conduit. Cubic yards of concrete. Not as a separate exercise, but as a byproduct of coordination.