It focuses on providing lightweight 10 questions subjective feedback from users. Pdf for almost 20 years, practitioners and researchers have been using the. 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. Check out our new page of system usability scale sus resources. Assessing the utility of the system usability scale for. It has become an industry standard with references in over 600 publications. Long a favorite among ux researchers for its simplicity and accuracy, sus is a valuable quantitative tool for anyone trying to optimize the user experience. Rather more than 25 years ago, as part of a usability engineering program, i developed a questionnairethe system usability scale susthat could be used to take a quick measurement of how people perceived the usability of computer systems on which they were working. According to kiss metrics, 47% of consumers expect a web page to load in 2 seconds or less, while 40% of people abandon a website that takes more than 3.
Mar 26, 20 in an empirical evaluation of the system usability scale2 the author claims that for internetbased web pages 50 users are needed to get a good result. The system usability scale was not created to measure usability of websites. As an example, to obtain a single numerical result for a questionnairebased metric, we might use the average of scores on questions 1, 2. The purpose of usability requirements is to guard against that. Comparing sus scores across different stages of a project shows how usability is changing. Shrink to printable area resizes only large pages to fit the paper and prints small pages as they are. Usability scale sus a reliable, lowcost usability scale that can be. Administering sus to users of an application can provide an easy and valid measure of. Revitalizing sus, the system usability scale jens oliver. The system usability scale is a questionnaire of 10 statements, much like the nps net promoter score, but instead of measuring the loyalty of customers towards your brand, the sus measures the perception of usability of your tool, system or website. An indonesian adaptation of the system usability scale sus. System usability scale measurement tool quick usability. System usability scale an overview sciencedirect topics.
We experimented with the use of a wellvalidated tool, the system usability scale sus, to evaluate two existing, commercially available vuis. When a sus is used, participants are asked to score the following 10 items with one of five responses that range from strongly agree to strongly disagree. Bill was interviewed by cranberry radio on ux at the conversion conference, june 2016. In an empirical evaluation of the system usability scale2 the author claims that for internetbased web pages 50 users are needed to get a good result. An overview of the system usability scale in library website. In measuring usability with the system usability scale sus 4 the author states that the user group and the reliability of the test is unrelated and a sus assessment can be done with as.
To meet the timing needs for product development, usability testing needs to be performed in a quick, cost effective manner. The system usability scale sus has become particularly popular because it is reliable with small numbers of participants tullis and stetson, 2004 and is relatively short 10 rating scales. The system usability scale sus is a 10item questionnaire that was published by john brooke in 1996 as a quick and dirty usability scale. Revitalizing sus, the system usability scale jens oliver meiert. Standard usability score questions apache openoffice wiki. The system usability scale sus is an inexpensive, yet effective tool for assessing the usability of a product, including web sites, cell phones, interactive voice response systems, tv. The sus is a technology agnostic tool consisting of ten questions with five responses for each question ranging from strongly agree to strongly disagree. A sus score appeals to stakeholders because it is simple, reliable and costeffective. Scale sus as a quick and dirty method of evaluating the usability of different. Pdf longitudinal studies have to do with testing over time and thus take into consideration previous user experience with a product or product. Check out toms new website, ux metrics geek, and his ux trivia quizzes. Thirtyfive emergency department clinicians completed a system usability scale sus questionnaire. Another alternative to pssuq is the system usability scale sus. A system can have adequate functionality, but inadequate usability because it is too difficult to use.
Sus is technology independent and has since been tested on hardware, consumer software, websites, cellphones, ivrs and even the yellowpages. System usability scale a case study paul olyslager. The references at the end of this page and the template provide more. Pdf the effect of experience on system usability scale ratings. System usability scale sus is a simple and standard measure of usability. I think that i would like to use this system frequently. Testing, usability evaluation, user research, usercentered design process. The system usability scale sus is a simple, tenitem scale giving a global view of subjective assessments of usability. Sus system usability scale, a summary malin fabbri. Perceived usability affects greatly students learning effectiveness and overall learning experience, and thus is an important requirement of educational software. Usability is all about saving users time and making the purchase process as fast and easy as possible. An empirical evaluation of the system usability scale. The translation is based on a crowdsourcing project initiated by wolfgang reinhardt during his time at the university of. Sus is technology independent and has since been tested on hardware, consumer software, websites, cellphones, ivrs and even the yellow pages.
Administering sus to users of an application can provide an easy and valid measure of perceived usability. Scale or resize printed pages in acrobat and reader. The system usability scale brooke, 1996 is a widely used, standardized 10item questionnaire to measure user satisfaction. Pdf validation of the system usability scale sus researchgate. On the insecurities of mobile d2d file sharing applications. The system usability scale sus is the most widely used standardized questionnaire for the assessment of perceived usability.
Evaluating the usability of speech recognition to create. The system usability scale sus is a standardized metric for measuring the usability of a website or other interactive system. Sus scores were analyzed and the results with kbm were compared to sr results. 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. This article presents nearly 10 years worth of system usability scale sus data collected on numerous products in all phases of the development lifecycle. The system usability scale sus was originally created as a quick and dirty scale for administering after usability tests on systems like vt100 terminal greenscreen applications. The system usability scale sample survey template consists of only 10 questions, which are answered using a likert scale. It is often assumed that a likert scale is simply one based on forced. Page scaling lets you shrink or enlarge pages when you print. Pdf perceived usability evaluation of learning management. The system usability scale sus is a simple, widely used 10statement survey developed by john brooke while at digital equipment corporation in the 1980s as a quickanddirty subjective measure of system usability. Some studies have shown websites average a wus score of 72. The system usability scale sus is a reliable tool for measuring the usability.
Institute of electrical and electronics engineers inc. Sus the system usability scale in response to these requirements, a simple usability scale was developed. Ill embed a link in the question for context for those unfamiliar with the term. Factor analysis of two independent sus data sets reveals that the sus actually has two factors usable 8 items and learnable 2 items specifically, items 4 and 10. While sus is frequently used today to measure the usability of websites, its usage is not limited to websites.
Measuring usability with the system usability scale sus. Within the usability evaluation methods, there are several usability assessment questionnaires. The system usability scale, or sus, is a simple survey that provides a highlevel score for the usability of a product. The usability scale sus is a standardized set of survey questions that allows us to benchmark our application against other offerings. We administered the sus to 12 participants after they completed a set of scenario tasks on amazons alexa and apples siri. Pssuq poststudy system usability questionnaire uiux trend. The factor structure of the system usability scale. The system usability scale sus provides a quick and dirty, reliable tool for measuring the usability. Usability scale sus a reliable, lowcost usability scale that can be used for global assessments of systems usability. It measures the perceived usability level of a product. It consists of a 10 item questionnaire with five response options for respondents. Op if youre using acronyms in questions you shouldnt assume everyone knows what you are referring to. Measuring and interpreting system usability scale sus.
For each single website usability test our users complete a short questionnaire and we calculate the wus score from that. It was developed at digital equipment corporation in the uk in 1986 as a tool in usability engineering of electronic office systems. The system usability scale sus was introduced by british software engineer john brooke in 1986. The website usability scale wus is a likert scalebased questionnaire to grade the usability of websites. The technique used for selecting items for a likert scale is to identify examples of things which lead to extreme expressions of the attitude being captured. The system usability scale sus a reliable, lowcost usability scale that can be used for global assessments of systems usability. This will help to identify usability issues as they arise it is much easier to make changes to early designs than a final system. System usability scale survey template by questionpro is a questionnaire that is used to evaluate the usability of a project. However, the sus is originally developed in english and there had not been any study. However, surprisingly few studies have used sus to evaluate the perceived usability of learning management. In systems engineering, the system usability scale sus is a simple, tenitem attitude likert scale giving a global view of subjective assessments of usability. In 2016 international conference on advanced computer science and information systems, icacsis 2016 pp. Sample size in the application of system usability scale.
Sus a quick and dirty usability scale human computer interaction. Santoso, journal2016 international conference on advanced computer science and information systems icacsis, year2016, pages 145148. Acrobat can size the pages of a pdf to fit the selected paper size. Originally developed by john brooke in 1986, over the last 31 years its become an indispensable method to quickly and accurately determine how a sites user experience compares to industry standards. Usability tests should be conducted throughout the design cycle, first on paper or early computer prototypes, then on a more complete system. The system usability scale sus was invented by john brooke in 1986 and is a quick and dirty but trusted way to measure the perceived usability of your website or app. As a key aspect of product development, usability of a product is needed to be assessed by conducting usability evaluation. Since its introduction in 1986, the 10item system usability scale sus has been assumed to be unidimensional. A retrospectivejus the journal of usability studies.
An indonesian adaptation of the system usability scale. A practical guide to the system usability scale sus. An overview of the system usability scale in library. It has been used extensively by various industries to test numerous systems and applications, including hardware, software, mobile devices, websites and applications usability. In spite of its age, over the years it turned out to be quick but not at all dirty. Hence the required sample size of participants for a usability study is one of the critical factors. The system usability scale sus is a wellresearched and widely used questionnaire for perceived usability evaluation. For german users, a group of sap usability professionals made a translation available in 20 which we proudly repost in this community. The score is out of 100 and a score of 100 indicates best usability. For each of the following statements, mark one box that best describes your reactions to the website today. Jan 06, 2015 the system usability scale sus is a 10item questionnaire that was published by john brooke in 1996 as a quick and dirty usability scale. It can be used to rate the usability of any system. The sample below shows a pssuq questionnaire to measure the usability of a website.
System usability scale sus usability body of knowledge. About 20 years ago, john brooke published the concept of a system usability scale, a reliable, lowcost usability scale that can be used for global assessments of. System usability scale sus is one of the most efficient ways of gathering statistically valid data and giving your appsite a clear and reasonably precise score. Learn more about uses of system usability scale with examples of questions used in a sus questionnaire and also how to calculate sus score. System usability scale survey template sample survey. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires. However, surprisingly few studies have used sus to evaluate the perceived usability of learning. The study was undertaken after participants undertook randomly allocated clinical documentation tasks using keyboard and mouse kbm or sr. Measuring usability with system usability scale sus. The effect of experience on system usability scale ratings. Brooke himself describes sus as a quick and dirty tool for assessing the usability of electronic office systems. Jan 26, 2015 the system usability scale is an attempt to solve this problem. The system usability scale is a 5point likert scale, with a total of 10 items which gathers responses from the respondent from strongly disagree at point 1 to strongly agree at point 5. The system usability scale, or sus, was created in 1986 by john brooke as a quick and dirty way to measure the usability of products usability.
The scale covers areas such as the complexity of the system or equipment being used, the functions within it, and overall feelings regarding the system or. This questionnaire is based on the system usability scale sus, which was. Because of its popularity, some benchmark data providing sus scores from a wide range of studies are available for comparison purposes. The system usability scale1 sus is a respected, scienti. The system usability scale, or sus, was created in 1986 by john brooke and has been used extensively by a variety of industries to test numerous applications and systems.
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