Cost distribution

Hi,

In R12:

When we enter Pre approved expenditure batch we run following process

PRC: Distribute cost then PRC: Generate cost accounting events then PRC: Create Accounting

In 11i:

When we enter Pre approved expenditure batch we run following process

PRC: Distribute cost then Interface cost to GL

I want to know why is this difference in 11i & R12? What are the significances of these different processes?

Thanks & Regards

Chaitanya