Keep each location accountable
A combined stock total is useful only if staff can see where the stock is and whether it is available. Two warehouses with ten units each are not the same as twenty units ready to ship from the customer's preferred location. Make warehouse and location identifiers consistent.
Seven checks for every transfer
1. Confirm the product and unit. 2. Name the sending and receiving locations. 3. Record the quantity released. 4. Make in-transit status distinguishable from received stock. 5. Assign a receiving owner. 6. Record a short, excess or damaged receipt. 7. Reconcile outstanding transfers regularly. Test whether your proposed system represents each step or needs an agreed supporting process.
Decide who promises availability
Sales and warehouse staff should use the same definition of available stock. Reservations, pending receipts and transfer quantities may need separate treatment. Specify which location will fulfil an order and who can change it. Automatic geographic allocation is an additional requirement, not an inevitable feature of multi-warehouse software.
Prove it with an exception
Move a small sample between two locations, deliberately short-receive one item and inspect the resulting balances. Confirm who can correct the difference and what evidence remains. Use that test in a VasKem demonstration before migrating all opening balances.