What is SUS analysis?
The System Usability Scale (SUS) provides a “quick and dirty”, reliable tool for measuring the usability. It consists of a 10 item questionnaire with five response options for respondents; from Strongly agree to Strongly disagree.
How many respondents are needed for SUS?
Technically you need at least two users to have some measure of variability (the standard deviation) and to generate confidence intervals. We have never done a test using the SUS with only two users. We will, however, report the SUS score with just five users.