In sap, when OU staff make the material requistion for patient. The cost will transfer to OU. But actually it should charge to patient
So this transaction is used for transfer the cost from OU to Patient
Debit patient
credit OU
Reference document
https://help.sap.com/erp2005_ehp_05/helpdata/en/4d/3ed9d3c467122be10000000a42189b/content.htm?no_cache=true