UX is very much a type of human factors. UX extends the scope of consideration beyond the product itself to any interface which might affect the user’s perceptions and feelings of the product. Yet, the goal is the same: understand the human’s needs in order to design interfaces that meet them.
The 737 is an excellent airplane with a long history of safe, efficient service. Boeing’s cockpit philosophy of direct pilot control and positive mechanical feedback represents excellent human factors. In the latest generation, the 737 Max, Boeing added a new component to the flight control system which deviated from this philosophy, resulting in two fatal crashes. This is a case study in the failure of human factors engineering and systems engineering.