The distribution model is a tool that stores information about the flow of message types between systems. A distribution model must be configured when setting up the driver. After the two logical systems have been defined and you have a general understanding of message types and IDocs, you can configure your distribution model.
The distribution model determines what message types can be sent from a client to another client, as well as the sending and receiving systems. Filters for IDoc segments can also be applied to distribution models.