A single company-wide stock number is easy to publish and it is usually a lie. If two thousand units sit in a warehouse that does not serve this customer, showing them two thousand available is a promise the business cannot keep, and the first time it breaks the sales team stops trusting the site.
What a buyer actually needs is the quantity that can be shipped to them, on the terms they buy on, in the time they expect. Getting there means the storefront knows which warehouse or warehouses serve that customer, and the availability calculation subtracts what is already committed to other orders rather than reporting what is physically on a shelf.
Platforms vary in how many stock locations they support and whether the storefront reads all of them or only a default one. Check both numbers against how many warehouses you actually run, and check what happens to a customer whose usual warehouse is out but another one is not.
Why it decides a platform
A single aggregate stock number across several warehouses is a promise the business cannot keep. Getting availability right is usually the difference between the storefront being trusted by the sales team or worked around by it.
Also called: multi-location inventory, warehouse availability.
Last updated 2026-08-20.