All goods movements in the warehouse must be traceable and trackable at all times, for example, material flows from the goods receipt and goods issue process or internal replenishment and stock transfer movements. Reliable demand planning is only possible if there is absolute transparency in the warehouse about the current stock and its movements. With the traceability of material flows, optimization potential can be identified and sources of error eliminated. A definition of priorities also supports the efficient design of warehouse processes and the avoidance of idle times.