The WMS shows stock is available, but the pick face is empty. How do I investigate replenishment breakpoints?

One of the most common sources of conflict in the warehouse is when the WMS shows inventory at the pick face, but the picker arrives to find an empty bin. Before a major promotion, we experienced continuous short picks. Operations claimed the system inventory was inaccurate, while the replenishment team insisted they had already restocked. Instead of adjusting the inventory immediately, I mapped…