It is here where the dysfunctional relationship between Boeing and Spirit manifests itself. The haggling over who is responsible for fixing issues that reach final assembly, and ultimately who pays to fix any issues, underscores the long-running strategic tension between the two companies. The delegation of those repairs, one knowledgeable person said, adds both time and needless complexity as Boeing factory staff wait for Spirit staff to plan and implement fixes, slowing down the entire process all under the same roof.

Quelle: 127 Days: The anatomy of a Boeing quality failure