Changing the Representation: State Tables
If you change the representation of the state model to a table, you can find even more opportunities for unexpected transitions.
Consider my alarm clock. It looks like Figure 3, Alarm clock interface, and it operates like a typical alarm clock.
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You can turn the alarm on or off.
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You can set the alarm time by pressing and holding the alarm set button and then pressing an arrow to indicate whether you want the alarm earlier or later.
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If the alarm is turned on, it buzzes when the clock ticks over to the indicated time.
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If you press the snooze button, the alarm quiets ...
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