So I wiggle the key then try taking it out and putting it back in Still locked

So i wiggle the key then try taking it out and

This preview shows page 29 - 39 out of 39 pages.

So I wiggle the key, then try taking it out and putting it back in. Still locked. Hm, something bigger might be wrong, look up and realize this isn’t my car. 29
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Good user interfaces help the user develop a good mental model of the system 30
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Another way is to support the construction of a mental model.
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Package tracking application on first us e
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State diagrams 33
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Today’s challenge: Microwave app We are going to have a running example today of a microwave Start with microwaves themselves Move on to apps 34
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Today’s challenge: Microwave app We are going to have a running example today of a 35 Start Done Set time Set cooking mode Cooking Sound “Bing” Door open button pressed
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