How to Create a System Usability Scale (SUS)


System Usability Scale (SUS) measures the general usability of a system, website, or application. However, it doesn’t measure specific characteristics like usefulness or accessibility. Also, it doesn’t help identify navigation issues, bottlenecks, or problems with particular interface elements.


The System Usability Scale Questionnaire consists of 10 general statements on a 5-point Likert scale. The scale ranges from “Strongly Disagree” - 1 to “Strongly agree” - 5. 


System Usability Scale can help you to


  • Collect relatively reliable results.

  • Distinguish between usable and unusable systems.


Here is how a System Usability Scale (SUS) survey looks on your website


SUS survey


In this article, you will learn :


1. Creating a System Usability Scale (SUS)

2. Calculating the SUS Score


 How to Create a System Usability Scale (SUS)


Step 1: In your Qualaroo dashboard, click "+Create New."


create new


Step 2: Select the Nudge type and click CHOOSE TEMPLATE.


select nudge


Step 3: Hover the cursor over System Usability Scale(SUS) template and click and click NEXT.


SUS templete


Step 4: Enter the target URL and click CREATE.


Step 5: Customize your survey with EDIT, TARGETING, and DESIGN  options and click SAVE.


Step 6: Activate the survey from the toggle button.


 How to Calculate the SUS score


sus score calculation 


Step 1: For odd-numbered items, subtract 1 from the user response. 


Example: User response - 1 = new value


Step 2: For even-numbered items, subtract the user response from 5. 


Example: 5 - user response = new value


Step 3: Sum up the newly calculated values for a total score that will range from 0 to 40. 


Step 4: Multiply this sum by a factor of 2.5


Doing so will give you a final SUS score between 0 to 100, which can be more quickly understood than values on a 40-point scale.


Step 5: Repeat steps 1 - 4 for each respondent. 


Step 6: Average your participants’ individual scores to get a final SUS score.


That is all about using the System Usability Scale (SUS).



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