Turnover-based storage policies store items with the highest turnover in the most convenient locations. For single-commandtravel, the convenience of a storage location is proportional to its distance from the pickup/deposit point.In dual-command travel, the optimal slotting strategy is not as apparent. We develop a heuristic search algorithm anduse it to investigate the optimal storage policies for dual-command operations in common aisle layouts, and in twonon-traditional aisle layouts using fishbone aisles and a flying-V cross aisle. The impact of optimal slotting, versusdistance-based slotting, is assessed.
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