Aprroving PO should be hierarchical
It will be proper if PO "approvers" have turns starting with the least in the approvers hiearachy to the senior most, in other words in a scenario where a Chief Technical Officer and General Manager have to approve a PO, the GM should only be able to access the PO for approval after the CTO has approved. Currently all approvers receive the the PO at the same time thus breaching the channel for approval.