After working with SAP for more than 15 years and travelling across the Globe for SAP Projects one enhancement I always use to build is to make sure the Buyer cannot buy more quantity than Released in the Purchase Requisition.
After sometime I got tired and said there should be an easier way to do it and guess there is a very easy way which will Cost the Customer nothing.
Go To Transaction Code OLME
Click as Mentioned Below
Now Click New Entries
Now Enter the following Entries and Save it.
Now we have only 15 Open quantity that can be used from the PR
Now we try to buy more than the Open Quantity available in the PR and Wala we got the Error. We did this without ABAP Coding.
In SAP there is always a better solution available if you have the urge to explore.
Here is the Video Version