Do not really see where you are going with ths.
Imagine a business that does not have all published products in stock, but rather has the products delivered in store, each week from the manufacturers.
The customers order online, and the business orders missing stock items from manufacturers.
Each Monday the business receives 100 products, to satisfy the pending orders.
Now they need to match each received product, to the customer who ordered it, and ship, and do this process as fast as possible.
How would you solve that?
If, for example, we could somehow type in the SKU, and see the orders it is included in, it would make this easy.