Running fulfilment for 4,000 SKUs is mostly about removing decisions from the picker's hands. Here is how I set it up.
Bin logic over memory
Pickers should never guess where something is. Every SKU has a fixed bin, and the pick list is sorted in walking order, not order-entry order. That one change cut our pick time more than any hire did.
Two-stage check
Mistakes are cheapest to catch before the box is taped. We scan at pick and again at pack, against the order. A mismatch stops the line.
What I would automate first
If you are drowning in mispicks, fix labeling and bin discipline before buying software. Tools amplify a good process, and they amplify a broken one just as fast.
Want this set up for your store? Book a call.