Poorly designed human-machine interfaces can lead to many unexpected problems . A classic example is the Three Mile Island accident , a nuclear meltdown accident , where investigations concluded that the design of the human-machine interface was at least partly responsible for the disaster . Similarly , accidents in aviation have resulted from manufacturers ' decisions to use non-standard flight instrument or throttle quadrant layouts : even though the new designs were proposed to be superior in basic human-machine interaction , pilots had already ingrained the " standard " layout and thus the conceptually good idea actually had undesirable results
Three Mile Island accident
Three Mile Island accident
Human–computer interaction