The purchase component functionality is used when you are sending the supplier material or components needed to either manufacture or pack the parts that you then purchase. You can choose to charge, i.e., sell the material or the components to your supplier, or not charge the supplier for the material and components.
There are two different methods to use:
If the customer order method is chosen, a customer order will be created when releasing the purchase order,
containing lines for the components that shall be sent to the supplier.
If the shipment method is chosen, a shipment will be created when releasing the purchase order depending on
shipment type set up, containing lines for the components that shall be sent to the supplier.