Accrual Load in R12

From what table does the Accrual Load (R12) get its Net po_distribution amounts that it posts to temp tables CST_AP_PO_RECONICLAITON and CST_RECONCILIATION_SUMMARY?  Is this source table updated real time or is it updated via a process, i.e. Receipt Accrual-Period End.

Our controller wants to run this process during the month, but not for reconciliation purposes. She wants to use it to get an idea of future cash requirements for items not yet vouchered. Oracle documentation does not address running the accrual load more than once at month-end for the reconciliation process.