Oracle Database Discussions

Hello,
My company ask me to check if the segragation of duties in the Oracle E-business Suite is right so I was thinking to write a small script to do that.
The problem is that there are so many functions that it seems to be impossible to do a perfect work.
Do you maybe know where I could find a list of functions that don't have to be given to the same user in order to implement a good segregation of duties? There is a freeware that already exists?

Thank you
BR
D.V.