How to investigate inventory discrepancies in a warehouse picking system

When inventory doesn't match in the WMS, don't rush into a full warehouse audit; the cost is too high. I start with the SKUs showing the largest discrepancies, checking for recent receipts not yet put away, cancelled picks, returned inventory, or manual adjustments. Often, the inventory isn't missing; it's that items were scanned out but not scanned in during bin transfers, or different batches…