The trolley that blocked the aisle
Pickers in one warehouse kept leaving their trolleys at the end of the aisle and walking down and back for every pick, which looked like wasted effort on any report. The trolleys were more than half as wide as the aisle, so a parked trolley blocked the stock for anybody else who needed to get past. The pickers had found a sensible way round a problem nobody had measured.
The forklift driver with the best numbers
One forklift driver's put-away figures were so far ahead of everybody else's that he was held up as the example to follow. He was overriding the system and dropping each pallet in the nearest free space at ground level, which spread one product across a whole run of pick faces and made every pick after it slower. He was doing exactly what the report rewarded, so the fix was a better report and a conversation rather than blame.
The batteries nobody mentioned
Procurement bought extra batteries near the year end to hit a supplier rebate, which made sense on their side of the business. Nobody told the warehouse until the containers turned up on the day, with no space, no labour and no plan for them. The warehouse manager was then judged against a plan he'd had no part in making.