Receiving IDoc from SAP

I created a routing rule, based on the document “web Method�s SAP R/3 Adapter User Guide”, and as a consequence a flow service was automatically generated and associated to that. I opened the flow service using the Developer and I find out on the tab flow, that it calls a “transport service”: Transport Service: INVOKE OutboundProcess. I didn�t understand “where” the service is “inserting”
the data. Do I need to complete the flow service and insert another function that it would write the data into a file or something like that…??