A Slotting Strategy That
Cuts Picking Travel by 30%

In a warehouse, a picker walks an average of more than 10km a day. And about 60% of picking work time goes not to actually grabbing items but to walking to where those items are. In other words, cut the travel path and productivity rises immediately.

The most effective way to cut travel is slotting — deciding which product goes in which location in the warehouse.

Turnover-based ABC slotting

The core principle is simple: put frequently shipped products close by. You sort products into three tiers by turnover.

Tier-A products are only 20% of total SKUs but account for 80% of picking. Placing them near the dock, in the waist-height "golden zone," shortens the travel path for your most frequent tasks.

How much does it actually shorten?

Here's a case from one fulfillment center. A Shin Ramyun multipack (averaging 248 outbound orders a day, Tier-A) sat in zone A-07, deep inside the warehouse. Moving it to A-01, close to the dock, shortened that SKU's average picking travel path by nearly 30%.

Slot it well once, and the benefit compounds across every pick, every day.

Deciding slotting with data

The catch is that turnover keeps changing. With seasons, promotions, and new products, a once-hot item goes cold and vice versa. So slotting isn't a one-time job — it has to be reviewed periodically.

This is where two kinds of data come in.

• Turnover by SKU — which products have shipped how often recently
• Fill rate and location by zone — where there's space, and how far it is from the dock

Overlay the two and you can spot "products with high turnover that are sitting far away." Those are your top reorganization priority. Visualize picking travel paths on a warehouse map and it also becomes obvious at a glance which workers are walking back and forth inefficiently.

How to get started

1. Pull outbound frequency per SKU over the last 30 days and classify into A/B/C.
2. Among Tier-A items, find the ones sitting far from the dock.
3. Check whether there's open space in a nearby golden zone and draw up a reorganization plan.
4. Measure picking time after reorganizing to verify the impact.
5. Re-analyze turnover once a month and refresh your slotting.

You can start in a spreadsheet, but once SKUs run into the hundreds, managing it by hand becomes hard. Automate turnover analysis and slotting suggestions, and your warehouse evolves to be steadily more efficient on its own.