Most warehouse improvement lists are generic. This one is ordered by payback, because the order is the whole point: fix the biggest cost driver first, measure it, then move to the next.
1. Slot for picking travel, not for tidiness
Picking travel is usually the single largest labour cost on the floor. Put your fastest-moving SKUs in the most accessible, closest-to-dispatch locations, and review slotting on a schedule as demand shifts. A neat warehouse organised alphabetically can be slower than a messy one organised by velocity. Measure units picked per labour hour before and after.
2. Match the picking method to the order profile
Single-order picking is simple but walks the most. Batch, zone, and wave picking each cut travel for a different order profile. If you ship many small orders, batch picking often pays back fastest. Pilot one method on one zone and compare pick rates before rolling it out.
3. Make the count trustworthy with cycle counting
A warehouse whose stock record is wrong wastes time on every pick that hits an empty location. Replace the annual stop-the-line count with ongoing cycle counts, weighted toward high-value and fast-moving items. The target is sustained record accuracy above 99% at the SKU-location level.
4. Attack the layout bottleneck, not every aisle
Walk the actual flow from receiving to dispatch and find where goods queue. Receiving backed up into the aisles, or a single packing station throttling dispatch, costs more than a suboptimal aisle in the back. Fix the bottleneck, then re-walk the flow, because the bottleneck moves.
5. Reduce touches
Every time a unit is handled is a chance to add cost and error. Cross-docking fast movers, receiving directly to pick face for high-velocity SKUs, and combining pick-and-pack where volume allows all cut touches. Count touches per order as a metric; it is a good proxy for hidden cost.
How to prioritise
Rank these against your own numbers, not a generic checklist. If pick rates are low, start with slotting and picking method. If you are shipping wrong items, start with accuracy and cycle counting. If goods pile up, start with the flow bottleneck. Measure one change at a time so you know what actually worked.