When To Use Multiple Pick Faces For A Single SKU

Pick Face The accessible warehouse location from which an item is picked to fulfill orders. Using multiple pick faces for the same SKU—sometimes called split-slotting or multi-location picking—can increase throughput and reduce congestion, but it also increases inventory complexity and replenishment overhead.

Deciding whether a SKU needs one or multiple pick faces depends on order profiles, channel mix (B2B vs B2C), SKU dimensions, and system capabilities. This article describes the scenarios where multiple pick faces make sense, the trade-offs involved, and operational controls that keep complexity manageable.

When Multiple Pick Faces Make Sense

Use multiple pick faces when it directly improves throughput, reduces travel time, or supports differing packing flows. Common scenarios include very high-velocity SKUs, packs with different pack sizes for different channels, seasonal surges, and split-case vs full-case mix requirements.

Typical Use Cases

• High‑Velocity SKUs: A single pick face may become a choke point when many pickers queue; placing identical locations in different aisles spreads traffic.
• Channel Differentiation: If the same SKU ships to retailers in full cases and to consumers in single units, separate full-case and pick-face single-unit locations reduce handling friction.
• Kitting And Multi‑Pack Variants: When the SKU is used in multiple assembly processes or pack sizes, dedicated pick faces for each variant speed build areas.
• Seasonal Or Promotional Spikes: Temporary secondary pick faces near packing lines shorten travel during peak periods.

Tradeoffs And Operational Costs

Multiple pick faces increase the number of replenishment events and add complexity to cycle counts and WMS location management. They may dilute inventory visibility, requiring tighter rules for minimum quantities at each location and stronger replenishment controls to prevent dead stock in one location while another is out of stock.

WMS Rules And Replenishment Controls

Proper WMS configuration reduces the overhead of multi-location SKUs. Set rules that prioritize replenishment to the pick face(s) with the highest recent demand, use wave or zone-based picks to allocate picks to the closest available pick face, and automate replenishment triggers with minimum and maximum thresholds per location.

• Replenishment Priority: Use demand-weighted replenishment so fast-moving pick faces receive stock first.
• Visibility Rules: Ensure the WMS reports aggregated on‑hand across all locations plus location-level details to avoid phantom stock.
• Pick Routing: Route picks to the nearest available pick face and prevent split-picks across two locations for the same order line unless specified.

Physical Layout And Slotting Considerations

Place multiple pick faces in separate aisles or opposite sides of a high-traffic zone to prevent congestion. If the SKU is heavy, maintain consistent ergonomic placements across all pick faces. For temporary pick faces used during peaks, mark temporary labels and predefine a deactivation process so inventory is re-consolidated after the event.

Measurement And When To Revert To Single Pick Face

Measure the impact of multi-location slotting using pick cycle time, order lead time, replenishment events per day, and pick accuracy. If replenishment events and labor handling increase disproportionately to the throughput gains, consider reconsolidating. Revert a SKU to single pick face when average daily picks drop below the threshold that justified split-slotting (commonly when per-day picks drop below the number that caused queuing or congestion).

In short, the Pick Face can be duplicated for a SKU to resolve traffic, channel, or packing conflicts, but only when the throughput gains outweigh the added replenishment and inventory-control costs. Clear WMS rules, measured KPIs, and disciplined slotting governance keep multi-location complexity from eroding the benefits.