Boeing corporate has been single-minded in doing nothing much to reverse the rot that arose from the MDD invasion of TBC. If they didn't get the message over the tanker debacle, the B737 ring frame saga, the 787 section joints, the Max, and production in the Carolinas, along with the tanker fuel debris etc... apparently the lads are inured to "signs". Moses, they ain't. Boeing doesn't however need a prophet, they need a leader that places quality higher on their agenda than bloated profits (prophets?) They have had more than a few hints to amend their ways, but seem to have the pioneer spirit to keep on in spite of common sense.,
I think, it is dangerous to insist on "quality", since this emphasizes "paperwork", which is already available in large quantities at Boeing, though watered down (because of the sheer volume), by those in charge to control the operations are performed according "the books".
What Boeing needs is the reverse to the concept of technical excellence as a leading item. And the understanding that long-term profits only come from the fruits of this technical excellence.
Time to dislodge the board.
I don't think, that is enough, there are far too many managers below that level, who simply miss the capabilities and/or drive for the technical excellence.
But, hey, this is how all big companies in the end start to fail.