Meaning
Inventory density metrics quantify the spatial arrangement of storage units within a commercial distribution facility. An array depth ratio calculates the number of deep storage slots relative to the number of pick faces accessible from a primary aisle. High values suggest a focus on volume storage or rapid selection.
Operations typically use this figure to balance the capital expense of floor space against the labor cost of double handling items.
Stock Rotation
Picking speed decreases when inventory is buried behind several units of the same stock keeping unit. Because the array depth ratio determines how many pallets must be moved to reach the furthest item, it dictates the forklift cycle time and overall labor efficiency in a high density environment. Slow turnover items often occupy deep slots to maximize the utility of the vertical and horizontal cube.
Fast moving consumer goods require lower ratios to prevent bottlenecks at the loading dock.
Warehouse Capacity
Total pallet positions increase as the footprint dedicated to aisles shrinks. A rising array depth ratio indicates a shift toward bulk storage configurations like drive in racking or push back systems. This change reduces the cost per pallet position but increases the risk of stock expiration in first in first out environments.
Facilities with constrained footprints rely on these ratios to meet volume commitments in distribution agreements.
Service Obligation
Fulfillment contracts often specify maximum turnaround times for inbound and outbound shipments. When the array depth ratio exceeds specific thresholds, the provider might face penalties for delayed container unloading. This happens because the time required to shuffle pallets to find a specific lot exceeds the window allowed by the shipping line.
Contractual terms usually account for these physical constraints when setting throughput guarantees.