!!! Overview[1]
[{$pagename}] is the ease of use and learnability of a human-made object such as a tool or device.

[ISO] defines usability as "The extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use." 

The lack of [{$pagename}] causes frustration.

[{$pagename}] is a Human specific factor. 

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [Usability|Wikipedia:Usability|target='_blank'] - based on information obtained 2016-09-03-