I belong to construction industry that deals in large scale projects. It is a common practice in business that the scope of work reduces as per actual work done.
We have PO in system with original scope of work and reductions to scope are treated through purchase requisitions with negative nature (a separate document type). Each PR/PO is assigned to a WBS and results in commitment to the project, however, the negative variations PR is also having the same effect as any PR i.e. increasing the commitment where as according to the definition provided above, it should reduce the commitment.
Far as I know, commitments created through PR/PO can only be reduced by short closing the line items but my requirement is to manually reduce the commitment on WBS. I'd like to know if that's possible at all in standard/customized SAP to post "negative" commitment?