Four steps, in order, every time.
A revision arrives. From that moment to a sealed Proof Pack is one path with four steps. No step is skipped, and each one shows its work.
Drop in the files. Get one canonical model.
Drop in IFC models and structured schedules across revisions. VentScan parses them into one canonical model and marks exactly where the sources disagree — before you’ve read a single row by hand.
Exact matches pass silently. The rest ask you.
Spaces, loads and equipment are matched with scored, explainable signals. Exact matches pass silently. Ambiguous ones surface for a two-second confirmation — with the evidence for the score in view.
The margin crosses zero. You find out now.
Each supported consequence of a change is recomputed — capacity margins, affected equipment — deterministically, with units and a maturity label attached. The undersized unit surfaces the moment the source lands, not on site.
Approve with the evidence in view. It gets sealed.
Approve or reject with the evidence in view. The decision is sealed into an append-only Proof Pack: sources, deltas, calculations, assumptions, limitations, hashes. Open it in two years and it still defends itself.