Travel is the single largest component of order picking labor in most distribution centers — routinely more than the picking itself. That makes the order picking cart a productivity decision, not a storage decision.
Fix slotting before you fix equipment
This is the unglamorous part, and skipping it is the most common way facilities waste money on carts.
If your fastest-moving SKUs are scattered across the building, no vehicle fixes that. Run a velocity analysis, pull your top movers into the golden zone nearest the pack-out, and re-measure travel per pick. Facilities that have not reslotted in two years often find 15 to 25% of travel disappears for free.
Once slotting is sane, equipment choice starts to matter a great deal.
The numbers to measure
- Travel distance per pick. Total distance walked divided by lines picked.
- Stops per hour. Drives the mount/dismount penalty.
- Lines per trip. Constrained by cart capacity.
- Trips to pack-out per shift. Each one is dead travel.
These four decide which format wins. High stops per hour and short travel per pick favor fast-dismount equipment. Long travel per pick and high lines per trip favor capacity.
Cart formats for picking
| Format | Strength | Weakness |
|---|---|---|
| Manual multi-tote cart | Cheap, high tote count | Slow, push force, more trips |
| Stock chaser (seated) | Capacity, comfort on long shifts | Slow on and off at every stop |
| Standing scooter with deck | Fast dismount, narrow, low cost per unit | Moderate capacity |
| Tugger with cart train | Huge volume, scheduled waves | Poor for ad-hoc picks |
The dismount penalty, quantified
At 40 stops per hour, a four-second dismount penalty costs about 21 minutes per picker per eight-hour shift. Across 20 pickers, five shifts, fifty weeks, that is roughly 3,500 hours a year.
Time it yourself with a stopwatch on your own floor before believing any vendor's figure — including this one. It takes an afternoon and it settles the argument permanently.
Batch and zone picking change the answer
If you batch pick, capacity matters more and stop speed matters less — you make fewer, longer trips. If you zone pick with handoffs, footprint and maneuverability dominate because you are working dense areas.
Do not import another facility's equipment choice without importing their picking methodology first.
Frequently asked questions
Should we buy carts or invest in goods-to-person automation?
Different capital scales entirely. Carts are a five-figure decision with a sub-year payback; goods-to-person is seven figures and multi-year. Many facilities do carts now and evaluate automation separately.
How many totes do we need per cart?
Match to your average order profile plus a margin. Sizing to your largest order wastes capacity all day.
Does riding reduce pick accuracy?
Not inherently. Accuracy is driven by scan discipline and slotting clarity, not by whether the picker walked or rode there.
What is a realistic productivity gain?
Depends almost entirely on your current travel share. Measure first, then use the calculator below.
