The order fulfillment process in term of 7-Eleven DCs order the products from its suppliers can be explained by steps thereafter. (Puapairoj, et al., 2009)
1. The inventory position in DCs is held indicating which of the products have to re- order. The purchase orders will be sent from DCs to the head office where the orders are checked by the purchasing department at head office.
2. Purchasing department verifies the orders and send the purchasing orders to each supplier.
3. The suppliers receive the purchasing orders and produce the products to supply the
DCs.