Hi Eli,
This question is for you, but if someone else knows the answer, can reply as well 
I was reading the e-book written by Eli regarding PSM-FM, a excellent e-book by the way, but there was an information that I didn't understand.
The e-book mentions that is possible perform the mapping between FM objects and financial entities, for example, assign a commitment item to a G/L account. However, it also says that this action does not imply the derivation during postings of FI transactions.
I've already noticed that, but I'd like to understand the purpose of mapping the commitment item in a G/L account. When the commitment item information provided on G/L account is used and what for!?
Thanks in advance,
Best Regards,
Rodrigo Amorim