Common
System usability scale
Likert scale in systems engineering
System usability scale
In systems engineering, the system usability scale (SUS) is a simple, ten-item attitude Likert scale giving a global view of subjective assessments of usability. It was developed by John Brooke at Digital Equipment Corporation in the UK in 1986 as a tool to be used in usability engineering of electronic office systems. The usability of a system, as defined by the ISO standard ISO 9241 Part 11, can be measured only by taking into account the context of use of the system—i.e., who is using the system, what they are using it for, and the environment in which they are using it. Furthermore, measurements of usability have several different aspects: effectiveness (can users successfully achieve their objectives) efficiency (how much effort and resources are expended in achieving those objectives) satisfaction (was the experience satisfactory) Measures of effectiveness and efficiency are also context-specific. Effectiveness in using a system for controlling a continuous industrial process would...
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