[3rd_gear_Ted]

The defense side of Boeing has a customer who insist on quality over cost.
The Hellfire Missile group was the only CMMI level 5 software group in the company.

Boeing Commercial Aircraft Group (BCAG) and the MacDac crowd would not adapt those software engineering systems & processes found to do the job by the defense side. Then along comes the MCAS software development & testing fiasco. The public whistleblowers connected the dots and the company conceded their errors. Thankfully the board of directors finally grew a spine.