They analyze the problem, they analyze the possible solutions, and they design a solution. And they get very upset when people don't behave logically. - Donald Norman
Now anybody who designs anything has a problem of understanding the thing they're designing too well, in that they can no longer really understand how a new person would act. That's why anyone who writes has an editor, because you cannot even proofread your own work. - Donald Norman
Each instrument actually may be designed quite well, and it may even have been rigorously tested. But each instrument works differently. Perhaps each has an alarm that goes off when something's wrong. Sounds good so far. But when you put it together as a system it's a disaster. Each alarm has a different setting, and the appropriate response to one may be incredibly dangerous for another. - Donald Norman
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