System usability scale

Survey methodology

In systems engineering, the system usability scale (SUS) is a simple, ten-item attitude Likert scale giving a global view of subjective assessments of usability. It was developed by John Brooke at Digital Equipment Corporation in the UK in 1986 as a tool to be used in usability engineering of electronic office systems. The usability of a system, as defined by the ISO standard ISO 9241 Part 11, can be measured only by taking into account the context of use of the system—i.e., who is using the system, what they are using it for, and the environment in which they are using it. Furthermore, measurements of usability have several different aspects: * effectiveness (can users successfully achieve their objectives) * efficiency (how much effort and resource is expended in achieving those objectives) * satisfaction (was the experience satisfactory) Measures of effectiveness and efficiency are also context specific. Effectiveness in using a system for controlling a continuous industrial process would generally be measured in very different terms to, say, effectiveness in using a text editor. Thus, it can be difficult, if not impossible, to answer the question "is system A more usable than system B", because the measures of effectiveness and efficiency may be very different. However, it can be argued that given a sufficiently high-level definition of subjective assessments of usability, comparisons can be made between systems. SUS has generally been seen as providing this type of high-level subjective view of usability and is thus often used in carrying out comparisons of usability between systems. Because it yields a single score on a scale of 0–100, it can be used to compare even systems that are outwardly dissimilar. This one-dimensional aspect of the SUS is both a benefit and a drawback, because the questionnaire is necessarily quite general. Recently, Lewis and Sauro suggested a two-factor orthogonal structure, which practitioners may use to score the SUS on independent Usability and Learnability dimensions. At the same time, Borsci, Federici and Lauriola by an independent analysis confirm the two factors structure of SUS, also showing that those factors (Usability and Learnability) are correlated. The SUS has been widely used in the evaluation of a range of systems. Bangor, Kortum and Miller have used the scale extensively over a ten-year period and have produced normative data that allow SUS ratings to be positioned relative to other systems. They propose an extension to SUS to provide an adjective rating that correlates with a given score. Based on a review of hundreds of usability studies, Sauro and Lewis proposed a curved grading scale for mean SUS scores. (Wikipedia).

System Design Interview: A Step-By-Step Guide

Learn something new every week by subscribing to our newsletter: https://bit.ly/3tfAlYD Checkout our bestselling System Design Interview books: Volume 1: https://amzn.to/3Ou7gkd Volume 2: https://amzn.to/3HqGozy ABOUT US: Covering topics and trends in large-scale system design, from th

From playlist System Design Interview

Unit Scale

This video shows how to use unit scale to determine the actual dimensions of a model and how to determine the dimensions of a model from an actual dimensions. http://mathispower4u.yolasite.com/

From playlist Unit Scale and Scale Factor

System Design Course for Beginners

This video covers everything you need to understand the basics of #system_design, examining both practical skills that will help you get a job as well as lower level details to help you get a deeper understanding of the concepts. You will start off by learning why huge companies like Googl

From playlist System Design

The Step Response | Control Systems in Practice

Check out the other videos in this series: https://www.youtube.com/playlist?list=PLn8PRpmsu08pFBqgd_6Bi7msgkWFKL33b This video covers a few interesting things about the step response. We’ll look at what a step response is and some of the ways it can be used to specify design requirements f

From playlist Control Systems in Practice

Multimeter Review / DMM Review / buyers guide / tutorial

A list of my multimeters can be purchased here: http://astore.amazon.com/m0711-20?_encoding=UTF8&node=5 In this video I do a review of several digital multimeters. I compare features and functionality. I explain safety features, number of digits, display count, accuracy and resolution. Th

From playlist Multimeter reviews, buyers guide and comparisons.

What Are Reactive Systems?

Reactive Systems use a high-performance software architecture. They are resilient under stress, and their reactive design allows them to scale elastically to meet demand. The reactive design approach allows the creation of more complex, more flexible systems and forms the basis for some of

From playlist Software Engineering

How Does Live Streaming Platform Work? (YouTube live, Twitch, TikTok Live)

Weekly system design newsletter: https://bit.ly/3tfAlYD Checkout our bestselling System Design Interview books: Volume 1: https://amzn.to/3Ou7gkd Volume 2: https://amzn.to/3HqGozy ABOUT US: Covering topics and trends in large-scale system design, from the authors of the best-selling Sy

From playlist System Design Interview

How To Choose The Right Database?

Weekly system design newsletter: https://bit.ly/3tfAlYD Checkout our bestselling System Design Interview books: Volume 1: https://amzn.to/3Ou7gkd Volume 2: https://amzn.to/3HqGozy Other things we made: Digital version of System Design Interview books: https://bit.ly/3mlDSk9 Twitter: htt

From playlist Database

Introduction to Systems Engineering open course

System Engineering is a professional discipline that ensures the timely management and delivery of large projects. This is a free, open online course delivered by leading UNSW Canberra academics on the Coursera platform. For more information visit https://www.coursera.org/course/introse

From playlist New to us? Try these.

How To Test Software Performance

What are the best types of software performance testing? What does the performance of a system really mean and how should we measure it? Performance testing is something of a black art. Performance testing tools aren’t enough alone to define a performance testing strategy. In this episod

From playlist Automated Testing

Backtracking Events as Indicators of Software Usability Problems

(October 2, 2009) David Akers discusses the difficulties in testing creation application testing on ease of usability. Akers claims that backtracking events can be effective indicators of usability problems, and can yield a scalable alternative to traditional usability testing for creatio

From playlist Lecture Collection | Human-Computer Interaction Seminar (2009-2010)

Earth System Science 1: Intro to ESS. Lecture 22. Biogeochemical Cycles

UCI ESS 1: Introduction to Earth System Science (Fall 2013) Lec 22. Introduction to Earth System Science -- Biogeochemical Cycles -- View the complete course: http://ocw.uci.edu/courses/ess_1_introduction_to_earth_system_science.html Instructor: Julie Ferguson, Ph.D. License: Creative Com

From playlist Earth System Science 1: Introduction to Earth System Science

22C3: Paper-Prototyping Workshop (de)

Speakers: Antenne Springborn, Ellen Reitmayr Eine Usability-Methode Paper Prototyping ist eine schnelle und effiziente Methode, um User Interfaces ohne Programmieraufwand zu modellieren und mit echten Nutzern zu testen. Benötigt werden nur ein paar Blatt Papier, eine Schere und ein Stift

From playlist 22C3: Private Investigations

Clinical AI Interest Group - December 2022

The Clinical AI Interest group is a community of health professionals from a broad range of backgrounds with an interest in Clinical AI. Our December meeting had the following talks: • Headlines - The Regulation of AI as a Medical Device – Speaker Nick Fuggle • 3-mins About Me -  Elis

From playlist Clinical AI Interest Group

What's New in Geometry

From playlist Wolfram Technology Conference 2021

Trusted CI Webinar: OnTimeURB with Prasad Calyam

Originally recorded March 23rd, 2020 "OnTimeURB: Multi-cloud Broker Framework for Creation of Secure and High-performance Science Gateways," with Prasad Calyam Slides: http://hdl.handle.net/2142/106612 Data-intensive science applications in research fields such as bioinformatics, chemi

From playlist Center for Applied Cybersecurity Research (CACR)

Lecture 25 — Designing Studies You Can Learn From | HCI | Stanford University

From playlist Human Computer Interaction (HCI) [FULL COURSE] | Stanford University

OSCON 2010: David Uhlman, "Modernizing VistA, ClearHealth's Invaluable Lessons from 'Legacy' ..."

http://oscon.com David Uhlman (ClearHealth, Inc.), "Modernizing VistA, ClearHealth's Invaluable Lessons from 'Legacy' Technology and Ways Forward"

From playlist OSCON 10 Health IT

8 Key Data Structures That Power Modern Databases

Weekly system design newsletter: https://bit.ly/3tfAlYD Checkout our bestselling System Design Interview books: Volume 1: https://amzn.to/3Ou7gkd Volume 2: https://amzn.to/3HqGozy LSM tree video: https://www.youtube.com/watch?v=I6jB0nM9SKU Other things we made: Digital version of Syste

From playlist Database

GTAC 2010: Lightning Talks - Day 2

Google Test Automation Conference 2010 October 28-29, 2010 Lightning Talks by various GTAC 2010 attendees. Slides for this talk are available at https://docs.google.com/leaf?id=0AYfT-BFGDnQkZDVzcmhiNF8xNDdkd3MzcXRjMw

From playlist GTAC 2010

System usability scale

Related pages