RMF™ takes several different actions in the course of producing a report, and the user exits allow you to modify each of these actions in order to change a report or produce a new one.
In the four separate processing phases of the reporter session, RMF:
the ISPF tables with the report data. The Monitor III Utility helps you to modify phases 1 and 3. Phases 2 and 4 are provided specially for user reports. See Data reporter phases for more details.