What is the role of vendors in a sales process?
In the case of a few businesses, a third party vendor provides products or services to a seller, who in turn sells them to a customer.
When a customer agrees to a quote, the seller generates a sales order (SO) to confirm the sale. In return, the customer generates a purchase order sends it to the seller to confirm the purchase.
The seller, in turn, sends the PO to a vendor who provides the required products or services.