Originally Posted by
Going Boeing
... an event like this shows how desirable it is to have an alternative assembly location to minimise ongoing disruption ...
Though there are two aspects to that, capability and capacity. Another location provides additional capability and so resilience, but it seems unlikely either facility would have enough capacity to maintain normal production on its own in the event the other is lost or significantly damaged; so either production rate would have to increase - not easy - or the build schedule would suffer. Then there are the practicalities of transferring production across the world in mid build ...