As a simplified example, let's say I am selling a car. I have two salable inventory items: a car, and an engine. Both are set up as "Build to Order" and both have the procurement method set to "Manufacture". When I sell a car, OpenERP automatically generates a manufacturing order for the car. However, one of the items in bill of materials is an engine, which also has to be manufactured. Ideally, I'd like to sell the car, and have that sale automatically trigger two build orders. One for the car, and one for the engine. Is there a way to have OpenERP create automatic manufacturing orders for items in a bill of materials that also need to be manufactured?