This document explain SAP Internal Order (CO –IO) and in step by step manner with the help of system screenshots.
Overhead Orders are internal orders used either to monitor overhead costs for a limited period, or overhead incurred by executing a job, or for the long-term monitoring of specific parts of the overhead. Independently of the cost center structure, internal orders collect the plan and actual costs incurred, enabling you to control the costs continuously. You can also use internal orders to control a cost center in more detail. You can assign budgets to jobs. These budgets are then monitored automatically by the SAP system to ensure that they are kept to. » Read more: Internal Order (CO –IO) Configuration Documents