Most fulfillment teams that are missing delivery windows are not losing time at the dock or in transit. They're losing it earlier, quietly, in the gap between what the system says is on the shelf and what's actually there. A picker goes to a slot for a unit that doesn't exist. Someone has to go find it, or sub it, or cancel the line. That's the delay. And it already happened before the order even started moving. Inventory accuracy is the unglamorous thing nobody wants to talk