Something like (or exactly) software systems safety methods should be applied to critical systems (such as aircraft systems). DoD does this for all of their critical software. And I say "something like" only to indicate there may be something particular about software in aircraft. I doubt it though. And as the article indirectly points out, analysis was severely lacking.

DoD Software System Safety handbook https://www.acq.osd.mil/se/docs/Joint-SW-Systems-Safety-Engi...

Full disclosure: The company I work at does this type of work. I don't work in that group.