The control to keep the PO line amount less than or equal to the PR line amount is in place by doing configuration in task - "Configure Requisitioning Business Function".
By this PO cannot be created with a line amount more than the PR line amount.
But while creating change order for the PO line, above rule of PO<PR line amount is not working. So buyers can actually submit the PO with amount greater than PR amount.
This is something not inline with business checkpoints.
Is there a way we can stop/reject PO line amount which is having amount greater than PR line amount automatically in Oracle application.