operation subcontracting

Hi all,

There r so many answers regarding this in SDN, but still I m confused which should I follow and which one not.

my scenario is like this

we have 5 operation in that 3rd operation is subcontract for which the material has to be send to vendor and after completion of operation have to receive from vendor and scrap also has to be captured.

I dont want it to make std process bcoz only when there is a capacity bottleneck subcontracting will be done otherwise that operation will be done in house.

I want it to be done through Production order screen by deleting the operation from the routing and inserting the subcontracting operation , confirming the operation which is before subcontracting operation etc

please provide your views how to map this.