Time is not lost during unloading, it is lost afterward
Unloading a truck is fast: forklifts empty the trailer in a fraction of the time it takes to verify what came off and put it away in its location. That is why the dock looks efficient while the receiving area fills up. The gap between those two speeds is what creates the bottleneck, and no improvement in unloading corrects it.
Verification sets the quality of the data that the rest of the warehouse then carries: if counting is done by eye and the delivery note is signed without checking, the discrepancy does not disappear, it is postponed. Putaway is the stage that almost never has an owner: when the shift ends and the load is still in the receiving area, the pallet sits in a place the system does not know about, and the next person who needs it will walk. Those two are the ones STOKA works on first.
What to measure to know whether receiving improved
Four indicators are enough, and all four are calculated from data the warehouse already has. Truck dwell time: dock departure time minus gate arrival time, averaged over the deliveries in the period. Time from unload to putaway: the time the last pallet was recorded in its location minus the time unloading finished, delivery by delivery.
Percentage of deliveries with a discrepancy: the number of deliveries whose verification did not match the supplier's document, divided by the total deliveries in the period. Percentage of deliveries recorded the same day: the number of deliveries entered in the system before the end of the shift they arrived in, divided by the total for the period.
The starting value is measured during the survey and the target is set with you: a reference number taken from someone else's operation does not help anyone decide.