In the SAP Advanced Planner and Optimizer (SAP APO), an order is a technical object that defines for a procurement transaction (in-house production or external procurement) when and where products are required and which resources are needed during this process. Sales orders and forecast requirements are also modeled as an order in SAP APO. Not every order has to contain all sub-objects. As a result, a sales order will not contain any information about the resource schedule or product receipts and a purchase order will not contain information on the product requirement or the resource schedule.

The term Order may refer to:

• Planned order
• Production order
• Purchase requisition
• Purchase order
• Sales orders
• Reservation (manual)
• Transport order
• Scheduling agreement
• Stock

The planned orders and purchase requisitions created in SAP APO are transferred to the SAP R/3 system. Other elements such as production orders, purchase orders and reservations are transferred from SAP R/3 to SAP APO. Changes to orders are transferred from SAP APO to SAP R/3 and vice versa.