System usability scale (SUS)

It describes the method of usability estimation. It is based on a list of 10 questions with five variants to answer. The answers are opinion scale from Strongly Agree to Strongly disagree.


The method allows holding a rapid and reliable usability measurement in any area — from software development to mobile devices' construction.


A significant advantage of it is its simplicity, reliability, and interpretation. With SUS, it is effortless to determine how usable the system is.

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