Empirical evaluation of effort on composing design models arxiv. A practical guide to the system usability scale sus. System usability scale sus a key tool in that usability metric toolbox is the system usability scale. Since its introduction in 1986, the 10item system usability scale sus has been assumed to be unidimensional. Sus includes 10 questions that are analyzed as a whole. How to use the system usability scale sus to evaluate the. 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. In section 4 we describe the empirical evaluation process developed to validate the tool analysis results. An empirical evaluation of the system usability scale. Application assessing product with system usability scale the. Put simply, usability evaluation assesses the extent to which an interactive system is easy and pleasant to use. The system usability scale sus provides a quick and dirty, reliable tool for measuring the usability.
It has been used extensively by various industries to test numerous systems and applications, including hardware, software, mobile devices, websites and applications usability. On the dimensionality of the system usability scale. This work is licensed under a creative commons attribution 4. An empirical evaluation of the system usability scale taylor. An overview of the system usability scale in library. It consists of a 10 item questionnaire with five response options for respondents. European portuguese validation of the system usability. However, surprisingly few studies have used sus to evaluate the perceived usability of learning management systems lmss. Two common methods used for this evaluation process are heuristic evaluation analytical method and user testing empirical method. European portuguese validation of the system usability scale. A retrospectivejus the journal of usability studies.
International journal of humancomputer interaction. The effect of experience on system usability scale ratings. Bangor, kortum and miller have performed an empirical evaluation of the sus metric and. Usability body of knowledge by user experience professionals association is licensed under a creative commons attributionshare alike 3.
System usability scale sus originally created by john brooke dec in 1986, sus is one of the best known standardized usability rating scales. The sus is a 10 item questionnaire with 5 response options. An empirical evaluation of the system usability scale dois. Methodology system usability scale measurement tool. The system usability scale sus is a tenitem rating scale for measuring. Comparing sus scores across different stages of a project shows how usability is changing. I think that i would need the support of a technical person to be able to use this system. Attitude the user satisfaction with the system whether to continue use the system or enhance their use of the system figure 2. However, surprisingly few studies have used sus to evaluate the perceived usability of learning management. The population of subjects which should gauge the usability of the software system. This article presents nearly 10 years worth of system usability scale sus data collected on numerous products in all phases of the. In systems engineering, the system usability scale sus is a simple, tenitem attitude likert scale giving a global view of subjective assessments of usability. The system usability scale sus is a simple, tenitem scale giving a global view of subjective assessments of usability. Pdf of sus for printing excel spreadsheet for calculating sus scores.
The system usability scale sus is the most used questionnaire to measure perceptions of usability it was developed 30 years ago by john brooke. The system usability scale sus is a 10item scale for assessing user friendliness 43 and appropriateness of a tool for a given context 44. 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. 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. Both of these methods have their own strengths and limitations, depending on the objectives and the context of the usability evaluation. For german users, a group of sap usability professionals made a translation available in 20 which we proudly repost in this community. Computer system usability questionnaire csuq, and two vendor specific. The translation is based on a crowdsourcing project initiated by wolfgang reinhardt during his time at the university of paderborn. A sus score appeals to stakeholders because it is simple, reliable and costeffective.
Timo jokela taysin taysin samaa eri mielta mielta 1. It is often assumed that a likert scale is simply one based on forced. Jus journal template the journal of usability studies. Scale sus as a quick and dirty method of evaluating the usability of different websites, software. The sus, developed by brooke 1996, reflected a strong need in the usability community for a tool that could quickly and easily collect a users subjective rating of a products usability. A proper evaluation of usability can only be done if three different entities are fixed hamborg, 1996. Usability evaluation methods different kinds of system evaluationresearch analyticempirical analytic means reasoning and working by analysis empirical means making observationsor measurements formativesummative formative research earlier. 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. Sus the system usability scale in response to these requirements, a simple usability scale was developed. I think that i would like to use this system frequently. The system usability scale sus is a widely used selfadministered instrument for evaluating the usability of a wide range of products and services.
The system usability scale sus is an inexpensive, yet. Miller, journalinternational journal of humancomputer interaction, year2008, volume24, pages574 594. Sus measures perceived usability by asking users to rate ten statements about the usability of a product on a scale of 1 to 5, generating a combined score of 0100. Measuring usability with the system usability scale sus. Bagor, kortum and miller has written an article on the system usability scale sus that is well worth reading for anyone using or intending the use sus in usability evaluations.
System usability scale sus usability body of knowledge. Eric ej1061142 perceived usability evaluation of learning. Things arent this simple at all though, but lets start by considering the following propositions about usability evaluation. Psychometric properties of the persian language version of. How to use the system usability scale sus to evaluate. Empirical validation of an automatic usability evaluation method. Numerous usability evaluation questionnaires designed to measure users subjective assessments of a system s usability i. It was developed by john brooke 1 at digital equipment corporation in the uk in 1986 as a tool to be used in usability engineering of electronic office systems. Revitalizing sus, the system usability scale jens oliver meiert.
The system usability scale sus is a wellresearched and widely used questionnaire for perceived usability evaluation. 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. I think that i would like to use this website frequently. The journal aims to provide usability practitioners and researchers with a forum to share. The system usability scale brooke, 1996 is a widely used, standardized 10item questionnaire to measure user satisfaction. In total, 22 users participated in the questionnaire sessions and the. It has become an industry standard with references in over 600 publications. Application assessing product with system usability scale. Perceived usability evaluation of learning management. Article information, pdf download for the system usability scale, open epub.
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. Accessibility 25 contentstrategy 71 informationarchitecture 6 interactiondesign 162. The most intuitive definition of usability is the property of the system that defines its degree of simplicity of use in terms of learning, storage and efficiency. The need for a foundation for evaluating usability evaluation methods among interactive system developers and users there is now much agreement that usability is an essential quality of software systems. We talked about his motivation and process for creating the now famous quick and dirty questionnaire. Recently, lewis and sauro proceedings of the human computer interaction international conference hcii 2009.
The system usability scale sus is a wellresearched and widely used. Possibly, the most widely adopted is the system usability scale sus. Usability evaluation the encyclopedia of humancomputer. The empirical also called userbased methods involve observing users interacting with products or asking them to express their perceptions of a products usability, while nonempirical also called expertbased methods involve an expert making a judgement about a products usability or a structured check of a products design qualities. The problem of empirical evaluation of model composition effort is rooted in the inadequate.
Pdf perceived usability evaluation of learning management. Evaluating usability of elearning systems in universities. Nurses n377 completed healthitues to rate the usability of a webbased communication system for scheduling nursing staff. Usability of elearning systems according to international organization for standardization iso 9241 11, usability is defined as the. 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. I had the fortune to meet with john in person last month in london. Revitalizing sus, the system usability scale jens oliver. Mielestani jarjestelma oli tarpeettoman monimutkainen 3. Evaluation methodologies we used different approaches to do the usability evaluation. Their article is based on almost 10 years worth of sus data more than 200 sus studies. Usability testing with users usability body of knowledge. This paper presents an empirical evaluation of the sus questionnaire in the context of lmss perceived usability evaluation. 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.
Usability evaluation any analysis or empirical study of the usability of a prototype or system goal is to provide feedback in software development in support of an iterative development process recognize problems, understand underlying causes, and plan changes goals of usability evaluation design construction formative evaluation. The factor structure of the system usability scale. The task frame in which the software system should be applied 3. The sus has been tried and tested throughout almost 30 years of use, and has proven itself to be a dependable method of evaluating the usability of systems compared to industry. It provides a reference score for participants subjective view of a products or services usability. Journal of usability studies interaction design foundation. The system usability scale sus was released into this world by john brooke in 1986. Empirical evaluation of the system usability scale orfanou, tselios, and. In the context of this study, the evaluation of the elearning system is to help enhance the design of the training and the design of the elearning system. John brooke i john brooke made sus freely available to a number of colleagues, with permission to pass it on to anybody else who might find it useful, and over the next few years occasionally heard of evaluations of systems where researchers and usability engineers had used it with some success.
It focuses on providing lightweight 10 questions subjective feedback from users. Sus is a technology independent ten item scale for subjective evaluation of the usability. The system usability scale, or sus, is a simple survey that provides a highlevel score for the usability of a product. Analytical and empirical methods for usability evaluation. Perceived usability affects greatly students learning effectiveness and overall learning experience, and thus is an important requirement of educational software. An empirical evaluation of the system usability scale by. Usability evaluation of learning management systems in sri lankan universities thuseethan, s. Usability evaluation of learning management systems in sri. This article presents nearly 10 years worth of system usability scale sus data collected on numerous products in all phases of the development lifecycle. For each of the following statements, mark one box that best describes your reactions to the website today. System usability scale john brooke, digital equipment corporation, 1986. 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. Recently, lewis and sauro proceedings of the human computer interaction international conference hcii. Perceived usability evaluation of learning management systems.
Feedback from our customers further underlines the exceptional usability of azurion average 0 68 100 87 the sus is based. Jul 12, 2016 the system usability scale sus is the most used questionnaire to measure perceptions of usability. This association strengthens the validity of the sus. Among the hci and usability communities, there is also much agreement that. The system usability scale sus is a widely used selfadministered instrument for the evaluation of usability of a wide range of products and user interfaces. 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. Luulen, etta kayttaisin tata jarjestelmaa mielellani usein. The system usability scale sus provides a quick and dirty, but a reliable tool for measuring the usability. 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. Mar 26, 20 in an empirical evaluation of the system usability scale 2 the author claims that for internetbased web pages 50 users are needed to get a good result. We developed a customizable questionnaire, the health information technology it usability evaluation scale healthitues and conducted an exploratory factor analysis to examine the scales psychometric properties. The aims of this descriptivemethodological study were to develop and investigate the psychometric properties of the iranian version of. Sus system usability scale, a summary malin fabbri.
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. 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. All annan anvandning av dokumentet kraver upphovsmannens. Francis, london, pp 189194, 1996, had a great success among usability practitioners since it is a quick and easy to use measure for collecting users usability evaluation of a system. The principal value of the sus is that it provides a single reference score for participants view of the usability of a product or service. Abstract in recent years, the usability of software has become a major research theme. August 4, 2017, filed under art and design this and many other posts are also available as a pretty, wellbehaved ebook. Empirical evaluation of the system usability scale semantic scholar. Empirical validation of an automatic usability evaluation. This paper presents an empirical evaluation of the sus questionnaire in the context. Permissions beyond the scope of this license may be available by contacting the usability bok project. 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. Measuring usability with the system usability scale sus it is the 30th anniversary of the creation of the most used questionnaire for measuring perceptions of usability.
The system usability scale sus was invented by john brooke who, in 1986, created this quick and dirty usability scale to evaluate practically any kind of system. 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 system usability scale sus is a standardized metric for measuring the usability of a website or other interactive system. It was developed by john brooke 1 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. 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.