A technique is described for facilitating delivery and adjustments of customer orders at a customer delivery site. A delivery courier is assigned a mobile field computing device for facilitating delivery and order adjustments of customer orders associated with that courier's delivery route. The mobile field computing device includes memory for storing customer order history data and delivery route data downloaded from a server system. The delivery route data stored in the mobile field computing device may be used by the delivery courier to facilitate delivery of the customer orders. Further, the delivery courier may use the mobile field computing device to process a variety of different order adjustment transactions at a customer delivery site.