On-Time In-Full ( OTIF ) is simple on paper and brutal in peak. A missed window here, a short-shipped pallet there—and suddenly you’re funding the retailer’s margin via chargebacks. Here’s the part most teams miss: OTIF isn’t won in the warehouse. It’s won in the calendar. A quick reality check.  Across the industry, suppliers routinely see November–December carrier on-time performance ( OTP ) sag as capacity tightens and dwell times creep up. Even modest slippage can stack i