What you getYour PDK earns its keep backfilled-runstodaystartsstallswaitsEmpty slotthe run waitswith finishing checksstartsfinishestapes outBooked runthe run fillsIllustrative mechanism — runs fill when their designers finish; no slot counts are claimed.The mechanism, not a measurement: a run fills when its designers finish — more finishers, fuller runs, fewer respins booked.Fuller MPW runs — the constraint is designers who finish, not fab access.Fewer respins — checks catch errors before a wafer is booked.Support moves from answering methodology questions to publishing rules that answer them.Lumicule