Have you experienced the issue that the commitment was not generated for Purchase Requisition and Purchase Order? Or the commitment value was not reduced or displayed as you expected? Now a new tool has been released with SAP KBA 2272940.
By running this tool, you will get the information about which customizing setting is requested for generating the commitment, and whether the commitment value is correct. In case of there is data inconsistency in the commitment table, it will provide you the resolution for fixing it.
You can find more detailed instruction in SAP Wiki page Commitment checking tool and the troubleshooting guide Commitments in Material Management.