Contingency dollars for Services

Summary

Is there a defined process in Oracle Cloud for contingency dollars for services?

Content

We have a very manual process for contingency dollars associated with Service Purchase Orders.   A requisition is entered and approved for $1,000,000 as an example by the Business Unit.   The Business Unit instructs Sourcing/Purchasing to only release the PO for $800,000, the remaining $200,000 is contingency for the potential of change orders.   This is done to minimize the number of approvals Senior Executives have to do on the purchase requisition side.     Is there a standard process flow in Oracle Cloud to support the management of contingency dollars?