What is the System Usability Scale (SUS)?

The System Usability Scale (SUS) is a standardized questionnaire comprising 10 items designed to evaluate the perceived usability of a system or product. It provides a simple and efficient way to assess user experience and satisfaction.

When to use the System Usability Scale?

SUS can be utilized at various stages of product development, particularly after a prototype has been created or during user testing sessions. It is particularly beneficial when seeking quick feedback on usability from users to identify areas for improvement.

When not to use the System Usability Scale?

SUS may not be suitable for every context, such as when detailed qualitative feedback is required. It should not replace in-depth usability testing or interviews that provide richer insights. Additionally, SUS might not be ideal for systems with very few users, as a minimal sample size could lead to unreliable results.

What is the anatomy of the System Usability Scale?

The SUS consists of 10 statements that participants respond to on a five-point Likert scale, ranging from "strongly agree" to "strongly disagree." The scale measures various dimensions of usability, such as ease of use, complexity, and overall satisfaction, allowing for a comprehensive analysis of user experience.