The single most important fact in warehouse picking economics is that travel dominates. The most time-consuming part of order picking is traveling, which takes up approximately 55% of a picker's time. Pickers spend more of their shift walking between locations than actually picking items — which means the biggest lever on picking productivity isn't picking faster, it's walking less.
Why Travel Is So Large
Travel accumulates because every order sends a picker to multiple locations, and the distances between those locations add up across hundreds of orders a day. When fast-moving SKUs are scattered or placed far from the shipping endpoints, pickers cover more ground per order. Poor slotting means pickers visit more locations and walk longer distances per order, regardless of the routing or batching strategy applied on top — the travel is baked into where the products sit.
How Much Is Wasted
Not all of that travel is necessary. Research and operational data consistently show that 30 to 40% of pick walk time is attributable to poorly slotted SKUs — walking that exists only because items are in the wrong place. Good slotting cuts that waste by 40 to 60%, converting travel time back into pick time and lifting picks per hour without adding people.
Attacking Travel With Slotting
Because travel is 55% of picking and a third of it is slotting-driven waste, slotting is the highest-leverage productivity tool available. The AI slotting agent, built on n8n with Google Sheets and Airtable, continuously identifies the misplacements driving wasted travel and recommends the moves to eliminate them. It's demonstrated at omnionlinestrategies.com/ai-agent-warehouse-slotting-optimization.