What Is the System Usability Scale (SUS) and What Is It Used for?

by | Jul, 2019

While a professional audit is important in the process of making a website accessible, community engagement can help uncover a great deal more. When engaging your user community, the SYSTEM USABILITY SCALE (SUS) is a simple, yet reliable system for measuring accessibility.

The SUS is a scale that measures the results from an information-gathering tool consisting of a set of 10 statements. Each statement has a choice of five responses ranging from “Strongly Agree” to “Strongly Disagree.” The SUS is widely used to evaluate the usability of computer-related products and services and was created in 1986 by John Brooke. It is now an industry standard and is often referenced in written publications.

The SUS is a quick and effective tool used to score users’ opinions of a system’s ease of use, effectiveness, efficiency, satisfaction, and overall compatibility. Some of the evaluation questions refer to perceived complexity, opinions of system functions, and confidence in the system.

Scores are calculated in a marginally complex manner and then converted to a number. The scores are between 0 and 100, and research has shown that a 68 is considered average.

To learn more about the System Usability Scale’s benefits, considerations, scoring, and more, visit System Usability Scale (SUS).


Customer Reviews

WP Always

Client Feedback

Luke L. (WordPress Page Speed Optimization) 02/21/21

"Very quick turn around on a high priority project!"

Jillian S. (WordPress Page Speed Optimization) 02/25/21

"WP Always was a big help in getting my website speed optimized. I will definitely work with them again in the future!"

Summer R. (WordPress Page Speed Optimization) 03/02/21

"WP Always was great to work with. We had them improve our web vital scores and set up a CDN for our site. Communication was a breeze and since technical SEO is not necessarily my forte, Ryan gladly held my hand through the entire process and took time to explain the changes that would take place. Our scores have improved dramatically from failing to passing scores in Search Console. I will most definitely be contacting him again if we need any kind of tech SEO wizardry."

Mason P. (WordPress Page Speed/Performance) 03/02/21

"Great work and good speed optimization improvements!"

Cynthia E. (Shopify Page Speed Optimization) 03/03/21

"Great work!"