PO creation for approved requisitions

Question

Hi Gurus,
can anybody please throw some light and help me with this scenario. We have release procedure setup for requsitions for cost centers only. The approval levels we have are 1000-5000 is level1, 5001-10000 is level2 and 10001+ is level3. If a  user puts in a requisition for 4000 USD, it goes for approval to person A. once it is approved this is ready to be convertted to PO. Now at this POint the buyer has teh capability to cut the PO against any amount higher than 4000 which was originally put on the requisition. Now my question here is since the requisition has been aprroved for 4000 USD which is in the limit of 1000 -5000, it is OK for us if the buyer goes ahead and creates a PO for 5000. But we dont want the buyer to create a PO for next limits like 5001 and above as the requsition was approved for only the limit range of 1000-5000. Similarly the buyer can create the PO for a lesser dollar amount also than 4000. These chaanges occur because by the time the PO is created the rrates might change in the real world. Can anybody please let me knwo if there is a way to put a hard error in PO creation if the buyer tries to create thee PO for an amount outside of the approved limit on the requisition.
Thanks
Anusha

Answer 1

Technically what Jurgen said, plus . . .
From a pure business point of view the PR is for business approval of a potential expenditure, value as indicated on the PR. That is business approval only.
The PO is the commercial aspect where the purchasing dept. take the PR and convert it to a PO, at the best cost they can for the requirement.
The person who created the PR puts an indicative value, the buyer who coverts it to a PO puts a definitive value, do you really want to go through the PR release loop every time market conditions dictate otherwise (or at least put a tolerance on it).
Regards,
Nick