The document category indicates the type of follow-on document that is to be created. It can also be used to control how a particular type of follow-on document is to be processed. You can transfer the document categories in an intermediate document (IDoc) or define them in a profile for controlling store orders in Customizing.

In the case of certain document categories (A, B and C), enhanced supply source determination is carried out during processing. This consists of a sourcing check, which determines whether internal sources of supply are able to deliver the merchandise. If the merchandise cannot be delivered, the system searches for an alternative source of supply.