PP with subcontracting

is it possible to do subcontracting with PP module.

becuase the material which is consumed in 1st operation has to be sent for some work to external vendor in second operation

so system creates a subcontracting PR

but the question is we have already consumed the raw material as we did good issue to production order so now the raw material quantity is zero and for subcontracting need to send some material to subcontractor.

so question is from where does this quantity going to come from??

or if i have mapped the secenrio in a incorrect way .please explain what is the right proceedure of doing subcontracting through production order.

i think in most of the manufacturing companies this case will be there