HI Ahmed
If you search SCN you will find the steps on how to create a BRFplus rule with the decision table
Are you trying to create an initiator rule to map in MSMP based on which request type has been chosen?
Start with this article
http://wiki.scn.sap.com/wiki/display/GRC/BRF+plus+Flate+Rule+-+GRC+Integration
If you get stuck, please show us where you are at for guidance and clarification
An initiator rule based on request type is quite simple to achieve for BRF+ and MSMP
Regards
Colleen