Slotting optimization

What is slotting optimization?

Slotting optimization is the strategic assignment of products to warehouse storage locations. It aims to reduce pick times, increase warehouse capacity and improve order accuracy through better inventory organization and accessibility.

How does slotting optimization work?

The location an item is assigned depends on attributes such as:

• Pick frequency

• Product dimensions

• Weight

• Order patterns

For example, fast-moving items are often placed in easily accessible locations, with less convenient areas reserved for slower items.

Grouping items this way can minimize travel distance, maximize space utilization and improve picking efficiency.

Warehouse slotting optimization strategies

ABC analysis

ABC analysis involves categorizing inventory by velocity and value:

• A = high velocity, high value

• B = medium velocity, medium value

• C = low velocity, low value

A-items occupy prime picking locations at ergonomic heights. B-items fill secondary zones, while C-items utilize upper racks and remote areas.

Product affinity analysis

Product affinity analysis positions items frequently ordered together near each other. If the warehouse management system (WMS) identifies that customers consistently order products X, Y and Z together, the slotting software recommends slots in close proximity. Warehouse operators travel less between picks, reducing inefficiencies.

Slotting analysis

Slotting analysis involves evaluating metrics such as labor hours, travel distance and aisle pick density. The warehouse slotting software then generates optimization recommendations, quantifying expected benefits before implementing changes.