Ship with preorder — stop parking shelf stock on orders that can't ship yet
A customer orders a throw that's on your shelf and a table that's on preorder. The order can't ship until the table arrives, but the throw still comes off your shelf and sits there for weeks. Meanwhile a newer order that only wants the throw gets backordered, and your store shows it as out of stock or on preorder while a unit is sitting in the warehouse. Ship with preorder fixes that. When an incoming purchase order for the in-stock item will arrive in time for the preorder item, SKU.io reserves the in-stock item from that purchase order instead of the shelf. The order still ships at about the same time, and the shelf unit goes to the next order waiting for it or stays free to sell.