The official business definition of Purchase Order Flow is the process of obtaining goods and services from an external source. It involves the ordering of goods or services from a vendor, and the subsequent delivery of those goods or services to the customer. The process begins with the customer placing an order with the vendor, which is then followed by the vendor issuing a purchase order to the customer. This purchase order outlines the details of the goods or services being purchased, including the quantity, price, and delivery date. The customer then reviews the purchase order and, if approved, sends a confirmation to the vendor. The vendor then prepares the goods or services for delivery and sends an invoice to the customer. Once the customer receives the invoice, they make payment to the vendor, and the goods or services are then delivered to the customer. The entire process is referred to as Purchase Order Flow, and it is an essential part of any business.