What does 'usable-in-life' mean?
Usability can breakdown when people are forced into thinking that the device will work exactly as shown on TV or in the manual guide, when in actual circumstances, even the most expensive and high-tech piece of equipment can error and become unresponsive.
How is usability-in-life different to usability-in-itself?
Usability-in-life is the way in which we take a simple device, that is easy to operate and then release it into the real world where it is faced with 'real' world situations. Usability-in-itself is the actual usability of the technology itself without any real world input.
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