Orders can be received from businesses, consumers, or a mix of both, depending on the products. Offers and pricing may be done via catalogs, websites, or advertisements.

An integrated order management system may encompass these modules:

Product information (descriptions, attributes, locations, quantities)
Inventory available to promise (ATP) and sourcing
Vendors, purchasing, and receiving
Marketing (catalogs, promotions, pricing)
Customers and prospects
Order entry and customer service (including returns and refunds)
Financial processing (credit cards, billing, payment on account)
Order processing (selection, printing, picking, packing, shipping)