The different types of overheads used in a company should be defined so that they can be utilized in the overhead apportioned process. These overheads are company dependent. The overhead type will identify whether the overhead is a fixed value or percentage of the internal price. If an overhead has been used in a rule, the type of the overhead cannot be modified. The Available option defines if a given overhead is available for use when setting up the overhead rules. The code parts and activity sequence are used to follow up the overheads on an activity using pre posting type PRJC13.