Blanket order
A blanket order is a purchase order the customer makes with its supplier which contains multiple delivery dates over a period of time, often negotiated to take advantage of predetermined pricing. It is normally used when there is a recurring need for expendable goods. Blanket orders are often used when a customer buys large quantities and has obtained special discounts. Based on the blanket order sales orders (release orders) and invoice items can be created as needed until the contract is fulfilled.