What is ABC slotting?

ABC slotting ranks SKUs by pick velocity and places the fastest movers in the most accessible locations. A items are the small set of SKUs that drive most picks, B items are moderate movers, and C items are slow movers. Slotting A items closest to packing cuts total travel.

What is the golden zone?

The golden zone is the waist-to-shoulder height band directly in front of the picker, reachable without bending or stretching. It gives the fastest, most ergonomic picks, so the highest-velocity A items belong there. Silver and bronze zones are progressively less convenient.

How are the A, B, and C bands decided?

SKUs are sorted from highest to lowest pick count, then a running cumulative share is taken. SKUs falling below the first cut-off, classically 80 percent of picks, are A. Those up to the second cut-off, around 95 percent, are B, and the remaining long tail is C.

Why does slotting by velocity reduce travel?

A small fraction of SKUs typically generate the majority of picks. Placing those few high-velocity items in the closest, golden-zone locations means pickers spend most of their visits in a compact area, sharply reducing the average distance walked per line.

How often should slotting be reviewed?

Velocity shifts with seasonality and product life cycles, so re-slot at least quarterly, and more often for fast-changing assortments. Re-running ABC analysis on recent order data keeps the golden zone filled with what is actually moving now, not last year's winners.

Warehouse Slotting Velocity Tool

Slotting decides which SKU lives in which pick face. Because a small set of SKUs drives most picks, putting those fast movers in the easiest-to-reach locations slashes the distance pickers walk. This tool runs an ABC velocity analysis on your order data and maps each band to an ergonomic pick zone.

How it works

SKUs are ranked from highest to lowest pick count and a running cumulative share of total picks is computed (a Pareto curve). Two cut-offs split them into bands:

sort SKUs by picks, descending
cumulative %  = running sum of picks / total picks × 100
band A  →  cumulative % ≤ A cut-off (e.g. 80%)  →  golden zone
band B  →  A cut-off < cumulative % ≤ B cut-off (e.g. 95%)  →  silver zone
band C  →  remainder  →  bronze zone

The golden zone is the waist-to-shoulder reach directly in front of the picker; silver is the band just above or below it; bronze covers floor level, overhead, or the far aisles. Matching velocity to ergonomic convenience minimises both travel and reach effort.

Example and tips

Feed in a dozen SKUs with their pick counts and you will typically see a handful of A items accounting for ~80 percent of all picks — those go to the golden zone nearest packing. The long tail of C items, each picked rarely, can sit in the least convenient bronze locations without much penalty. Re-run the analysis every quarter: velocity drifts with seasons and product life cycles, and a golden zone filled with last season’s winners quietly costs you travel every shift.