Represents a simple view on stock levels for a particular product
The product is completely out of stock. Attempts to order the product will almost certainly be rejected by the Outlet.
The product is low on stock. Attempts to order the product may by rejected but there still may still be some stock on hand.
It is recommended to provide a warning to the user that stock levels are low and that the order may fail.
The outlet will define what constitutes "low stock" on a product by product basis and may also opt to ignore a low stock warning entirely.
The product has sufficient stock. Attempts to order the product will almost certainly be accepted by the outlet.
The outlet will define what constitutes "sufficient stock" on a product by product basis.