RA Settlement User Exit for Posting rules

Question

Hi,
For settlement of RA data the postings rules are defined in OK8G and the same are used while running settlement CJ88 or CJ8G.
My question is do we have a user exit which kicks in at the time of settlement and could let us change the rules for a certain set of Projects?
OR if we could have a substitution rule in place that could kick in at the time of settlement and would pick up the rule based on a critria?
The reason for the above question is because we are trying to settle the Projects based on two selection critira:
a) Based on RA key i.e. for RA key A use posting rule "123" and for projects with RA key B use posting rules "456".
b) Based on the Work in Progress ( POCI and POCS) values we need to further decide if we need to change the posting rule or use exiting one.
If RA key = A
  use rule "123"
      else if WIP position < 0
        use rule "123"
     else use rule "456"
End

Answer 1

Ankush,
These are the routines for validation / substitutions where in you can write your own code. Check it in SE38.
Regards
Sreekanth