system

I missed the option in which there is a clear distinction between the cause being at Boeing or the lack of regulations. The Regulations taken into account would have prevented the one sensor design overriding a main control surface in such a huge degree.

system

Much of the problem lies with the arrogance of top management in FAA and The industry in general.
If Engineers and Mechanics are critical they will find themselves out of a job. Workshops find their business going to the lowest bidders.