Itqualityassurance
User #1 score + user #2 score + user #3 + [etc.] / # of users = SUS Score.
What does SUS score mean?
Interpreting System Usability Scale (SUS) Score
SUS score will be able to tell you your usability performance in the aspects of effectiveness, efficiency, and overall ease of use. Although each responses yield a score on a scale of 0 – 100, do not mistake it as a percentage or percentile. The average SUS score is 68.
What is the SUS number?
The SUS rating is a number from 0 to 100. The higher the SUS of your site, the easier it is to use. The SUS is derived from a 10-item questionnaire that users answer after completing a test. The answers are on a scale of 1 to 5, where one means that they disagree completely and five that they fully agree.
How many points is SUS rating scale?
The SUS is composed of ten statements, each having a five-point scale that ranges from Strongly Disagree to Strongly Agree. There are five positive statements and five negative statements, which alternate.
