Benefits outweigh the risks
This is feasible only when the management tries to gain insight on the happenings in the partner concerns and also develop the coordination between them.
Supply chain issues
The cracks developed in the plan when the outsourced centers delayed the delivery. The supply of special fasteners that were especially used for fuselage created huge problems.
Boeing should closely work with the centers where it outsources the work. By this way, it can understand the development stages and scrutinize them as and when required.