Subcontracting of Delivery Trips?

Let’s suppose a company manufactures products and has a fleet of vehicles for delivery of the goods. Normally we would use a Delivery Trip for this.

How would we model Subcontracting out the delivery using a 3rd party transport company? How about the scenario where a customer comes and picks up the product from the factory?

Would I need to use a Delivery Trip in either of these cases?

Thanks in advance!