That depends. if you look at the history of the 787 project, Boeing way overestimated their suppliers' ability to take on major engineering and manufacturing tasks. But they all signed contracts that said they could. Everyone who has let a contract for outsourced software knows an outsourcing shop would never blow smoke up your ass, right?

For the 787 bad outsourcing cost Boeing literally $10s of billions in overruns and a plane that was initially sold at a loss of tens of millions per unit and is unlikely to ever make development costs back.

That's Harry Stonecipher's legacy. He was going to show those arrogant 777 engineers how it's done when a tough manager takes over.