I have the following case:

The production of a manufacturing product is completely subcontracted. The main company sells the product and buys the base materials. On production, the base materials needed for production are send to the subcontractor. Sometimes the decide that the putt fast moving base material on stock at the subcontractor. So in that case, when a production order is created, there is no need to send base material

I found out to setup a subcontractor location, by using a routing, but I don’t know how to set up that the stock is always first taken form the subcontractor location and after that on my location, so that I can move it to subcontractor.

Every help is welcome!