What a warehouse inside the ERP does better
Stock is not a list. Stock is a chain of evidence.
A warehouse is not judged on a good day but on a bad one: during a recall, during an audit, when the stocktake shows a difference. These six decisions are built for that.
Movements nobody smooths out afterwards
Every stock movement lands in a journal that can only grow; the database itself prevents later changes. Each line carries the type, the signed quantity, the balance afterwards and the provenance. Anyone asking how a balance came about reads it rather than reconstructing it.
Lots and serials, mandatory rather than optional
Articles under traceability cannot be issued without a lot or serial number. The assignment is enforced at every outbound gate, not only at goods receipt. That keeps the chain complete, precisely when things have to move fast.
FEFO at every outbound gate
First to expire, first out: the expiry order applies in shipping, at the register and in the service order alike. Expired or blocked goods do not pass, they are refused.
Real bin locations, not just a warehouse name
Quantities sit in bins, not merely in a warehouse. Zone, pick sequence and blocking flags belong to the bin. Bin-to-bin transfers keep their own journal, and the sum of the bins always matches the article balance.
Not an island
Sales, purchasing, point of sale, service and accounting work on the same stock. A sale at the counter posts immediately, a supplier invoice updates the cost, the valuation reaches the general ledger. No nightly reconciliation between two systems.
On your server
Stock levels, suppliers and purchase prices are trade secrets. They sit on your machine, not at a vendor, and can be exported to open formats at any time.