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When I was in engineering school, we learned about ergonomics. The goal was to design products that consumers liked. ....
Unfortunately, what consumers like is not always safe or best. I take it that consumers like push buttons instead of dials for climate control. My Tahoe has three dials for climate control, plus a button for recirc, and one to force the AC on or off. I don't need the buttons much, and the three dials are easy to find and adjust without taking my eyes or concentration off the road. That is very well designed. Unfortunately, because it looks dated, GM has moved to more push buttons.
We also have an explorer which has push button controls. For me to simply change the fan speed, I have to look at the controls to make sure I'm adjusting the right thing. If the windshield suddenly fogs up, I have to look at the controls to find the defog button. This, to me, is a very dangerous situation because if the windshield is fogging up, I need to keep my eyes on the road even more, but I have to take my eyes off the road to find the defog button. On my Tahoe, I reach over and zip the right hand side dial fully clockwise. It's easy to find, easy to adjust. But GM messed with that one.
And don't get me started on those big screens in the dash boards.