Order processing is the process that ensures customer orders are accurately processed, prepared, and delivered without any errors. Order processing for ecommerce typically includes receiving the order, picking, packing, and shipping the products to the customer.

You draft a purchase order explaining the products you want to purchase, the quantities of each product, the delivery date, and your budget. You send the PO to your ideal vendor. The vendor accepts to fulfill the order outlined in the PO (or cancels it if they’re unable to).