third party subcontracting

Hi Expert,

I have some subcontractor related problem.

In subcontracting process component to be supplied by " Third party" not by our company,we create the purchase order and given the delivery address to the subcontractor address. in this process which movement type is use for transport the material to the vendor and which movement type is use by system to consume the supplied material. what is the procedure please explain in detail.how many PO have to be created in this process.

Please explain step by step with T-code ,item category and with movement type