Warehouse Layout and Flow: Common Mistakes and How to Avoid Them
Warehouse layout and flow design determine how efficiently products move from receiving through storage to picking, packing, and dispatch. A well-designed warehouse minimises travel distances for the most frequently handled items, reduces congestion, supports safe and ergonomic working conditions, and can be reconfigured as product mix and volume change. A poorly designed warehouse creates unnecessary travel, congestion, and double-handling -- all of which translate directly into higher costs and lower throughput.
In 2022, warehousing operations are under pressure from high labour costs, e-commerce growth, and supply chain volatility. Here are the common mistakes that undermine warehouse layout and flow performance -- and how to avoid them.
Mistake 1: Designing for Average Rather Than Actual Product Velocity
The most common warehouse layout mistake is placing products in storage locations based on product category or supplier rather than on product velocity -- how frequently the item is picked. In most warehouses, 20 percent of SKUs account for 80 percent of pick activity. Placing those high-velocity SKUs close to the dispatch area, in ergonomically accessible locations, dramatically reduces travel time. Placing them deep in the warehouse in arbitrary locations because that is how they were grouped by product category is a significant, avoidable inefficiency.
Mistake 2: Not Planning for Product Mix Change
Warehouse layouts are designed for a product mix that is current at design time. Product mixes change -- new products are added, old products are discontinued, seasonal peaks shift demand. A layout designed around a product mix from three years ago may be significantly suboptimal for the current product mix. Review product velocity data annually and update slotting positions accordingly.
Mistake 3: Confusing Zone Design With Flow Design
Zoning a warehouse (grouping similar products in defined areas) is not the same as designing for flow. A warehouse can have well-defined zones and still have poor flow -- if the zones are arranged so that picking a typical order requires travelling from one end of the warehouse to the other, zoning has not helped.
Flow design asks: what sequence of locations does a typical picker travel through when filling a typical order? Slotting and zone placement should minimise total travel distance for the most common order profiles, not for hypothetical orders or infrequent large shipments.
Cross-docking opportunities are often missed because the warehouse was not designed with flow in mind. Products that arrive on inbound trucks and go out on outbound trucks within hours do not need to be put away in storage at all -- but the layout must support direct transfer from receiving to dispatch.
XNM supports public-sector and capital-project organisations in supply chain design, warehouse operations, and logistics strategy. Reach out to XNM's procurement, sourcing & contract management team to discuss warehouse design and supply chain logistics for your organisation.