DOET Intro ITEC4130 Dr. Jim Rowan
Norman on DOET The three outstanding themes: It’s not your fault Design principles Conceptual models Feedback Constraints Affordances The power of observation
Other terms to be seen in DOET Design model (designers’s conceptual model of the world) System model (the model of the world presented by the device) User model (user’s conceptual model of the world) Knowledge in the world Knowledge in the head
Impressive design failures Apollo 13 mission representation failure A320 http://www.youtube.com/watch?v=_EM0hDchVlY Therac 25 www.stanford.edu/class/cs181/Materials/therac.pdf from “Set Phasers on Stun” by Steven Casey