B2B and B2C Implementations QAD CSS can be used to manage orders in two different business scenarios. The particular scenario you want to support influences how you set up your system and which functions you use. • In the business-to-business (B2B) scenario, you sell items through your Web site to established customers that are defined before they access your site. These customers log in to your system and establish their identity. They often buy items on a regular basis, use order templates to facilitate the order-entry process, and pay for items with purchase orders. • In the business-to-customer (B2C) scenario, you sell items to any shopper that comes to the site and do not require shoppers to identify themselves until they are ready to place an order. These buyers are most likely to pay for items with a credit card.