Swati,
In OPPS, the bottom section only shows the assignment of the default Sales Requirements type. For Strategy 40, the default Requirements Type is KSV.
Reduction in 40 is determined as part of the PIR requirements class (not through the sales requirements type/class). In 40, the standard is VSF/101. In OMPO you can see that there is consumption, and that reduction for this class is "blank" - No reduction of ind. reqmts (only in withdrwl for sales ord).
There are cases where you may not want requirements consumption, but you still wish to have requirements reduction (such as strategy 10, where the standard is PIR LSF/100 and Sales KSL/030). Here, setting the Reduction flag in the Sales Requirements Class still allows requirements Reduction, even though there is no consumption/reduction determined through the PIR class.
Best Regards,
DB49