Hi!

We have a product that consists of few components. We buy some of the components but don't receive them directly to our warehouse but send them to a factory that is our subcontractor so they create the final product for us. Some of the components, we don't buy and the factory buys. When they made the final product, they send it to us. 

Now my question is, how I should set up the system for this type of products? Should I put all the components in the product? Should I create bill of material for the final product? If so, how I should do it since we don't receive those components in our internal warehouse?

Thank you