WMS: three letters for Warehouse Management System, the software that runs a warehouse. If your 3PL does not have one, walk away. If they have one but you cannot access it, push back.
What the WMS knows, every second
Where every SKU is, in what quantity, reserved by which orders. Which items were scanned into which parcel, by whom, at what time. That level of traceability is not luxury: it is what enables 99.9% inventory accuracy and an error rate below 0.2%.
What it changes for you
- No more safety overstock: you see the real figure, you order just enough.
- No more overselling: stock shown on your store is true stock, synced continuously.
- Managed replenishment: threshold alerts by SKU, no surprise stock-out on a best-seller.
The right question to ask
Of a future logistics partner, do not ask "do you have a WMS?" — the answer is always yes. Ask: "what will I see, and how quickly?". The quality of the answer is worth every sales pitch.
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