Consider and plan for the possibility of control system manipulations compromising critical medical equipment e. System usability scale sus the system usability scale sus provides a quick and dirty, reliable tool for measuring the usability. 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 first step in scoring a sus is to determine each items score contribution, which will range from 0 to 4. Software usability measurement inventory sumi, poststudy system usability questionnaire pssuq, and the system usability scale sus. Original system usability scale, also known by its abbreviation as sus was developed by john brooke in 1986, it allows you to evaluate a wide variety of products and services, including hardware, software, mobile devices and websites. The session being audiovideorecorded cross out as appropriate the use of photographs and video recordings for the purpose of documenting the findings from this study. Feb 24, 2017 the system usability scale, or sus, is a usability quantification survey created in 1986, by john brooke at digital equipment corporation dec, now part of hewlettpackard.
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. It consists of a 10 item questionnaire with five response options for respondents. 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. Sus described in detail in chapter 6 is based on selfreported data from a series of questions about the overall usability of any system.
As mentioned above, sus survey consists of 10 statements and each one is presented in a form of a likert five point scale, ranging from 1 to 5. Problem statement and test objectives user profile methodology scenarios evaluation methods. Usability of a homeuse blood pressure monitor system. After each usability testing session, give the user the 10question sus questionnaire to com. The system usability scale sus is a common metric used to assess. 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 work is licensed under a creative commons attributionnoncommercialsharealike 4. Applied sciences free fulltext the usability testing of vr. Posttest questionnaires like the system usability scale sus are popular for both labbased. For positivelyworded items odd numbers, the score contribution is the scale position minus 1. Pretesting the chinese version of the system usability.
Measuring usability with the system usability scale sus. In ux, sus is always used in an online survey or after each usability testing session for users to fill in. Sus scores empirically identify a users subjective rating of a products usability brooke, 1996. The posttest evaluation will include the system usability scale sus questionnaire scored through morae.
In usability, the system usability scale sus is one example of interval data. System usability scale sus is a questionnaire that is used to evaluate the usability of a project. All sus and participant opinion data was presented and recorded by the morae usability software. The numbe r s are not important as such, but rather an indicator of whether the process is working and is able to handle the scale. A project to translate the system usability scale into. How to run usability tests at scale by anirudh b balotiaa. 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. 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. System usability scale an overview sciencedirect topics. Usability of the plan quality index to support evaluation of. The addition of the adjective rating scale to the sus may help practitioners interpret individual sus scores and aid in explaining the results to nonhuman factors professionals. The system usability scale sus is a 10question questionnaire that offers a quick, costeffective yet accurate.
Spanish version of the system usability scale for the assessment of. The word usability is tossed about quite a bit in the software design world. The system usability scale sus is a reliable, lowcost usability scale that can be used for global assessments of systems usability. Our online version of sus tool has a builtin score calculator and the data is analyzed in realtime, producing instant and easy to read values however, if you are wondering how sus calculator works, heres a quick overview.
The system usability scale sus is a standardized metric for measuring the usability of a website or other interactive system. The system usability scale sus is undoubtedly the most frequently used questionnaire to measure usability. What is the difference between these questionnaires and which should you use. For each scale, the repository includes information about the validation process, appropriate usage, individual survey items, scoring procedures, and references to additional materials when applicable. Dec 30, 2020 after using the pqi to assess injury prevention action plans, the individuals were given a system usability scale sus survey to assess the usability of the pqi. The system usability scale sus is a simple, tenitem scale giving a global view of subjective assessments of usability. Pht solutions used the persona of alex parker to develop the test plan and the user. Sus pdf generator free, multilingual system usability scale questionnaire generator. For positivelyworded items odd numbers, the score contribution is the scale. Revitalizing sus, the system usability scale jens oliver meiert. Usability scale sus scores from different user groups including students n 7. Item 8 shows awkward in place of the original cumbersome. Pdf the factor structure of the system usability scale. I think that i would need the support of a technical person to be able to use this system.
Pssuq originated from an internal ibm project called sums system usability metrics in. Usability scale sus scores from different user groups including students. It has been used extensively by various industries to test numerous systems and applications, including hardware, software, mobile devices, websites and applications usability. It is widely used to measure users perceived satisfaction of a website, software, system or product at the end of a study. The first section gives an overview of usability testing, explains the place of usability testing in the development cycle, and discusses. The results of the assessment of the usability scale system will provide input for future website development to be even better. Tullis and stetsons study 2004, sus, the shortest survey in the study, was among those providing. Nov 19, 2018 system usability scale sus contains 10 questions where participants are given 15 scale to fill, according to how they agree with every statement regarding product or feature on the test. 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. As we began to study the usability of biometric technologies and applications we realized that our partners in the biometric community were unfamiliar with usability terminology and methodologies.
The posttest evaluation will include the system usability scale sus. The online course on usability testing by the interaction design foundation. Results show that the likert scale scores correlate extremely well with the sus scores r0. Average 5060 sessions, in different cities, covering 6080 users in a month. I thought there was too much inconsistency in this system. Participants satisfaction ratings of the system 1 very difficult 2 difficult 3 neither easy or difficult 4 easy 5 very easy system usability scale sus all participant data was deidentified no correspondence could be made from the identity of the participant to the data collected. Participants will rank each question from 1 to 5 based on how much they agree with the statement they are reading. Originally created by john brooke in 1986, it allows you to evaluate a wide variety of products and services, including hardware, software, mobile devices, websites and applications. I think that i would like to use this system frequently. This proved to be an extremely simple and reliable tool for use when doing usability evaluations, and i decided, with the blessing of engineering management at digital equipment co. Previous research suggests that the system usability scale sus might not be generating. System usability scale online with analytics usabilitest.
Customizzed common industry format template for electronic. An overview of the system usability scale in library website. 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. Usability of the plan quality index to support 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. The pssuq poststudy system usability questionnaire is a 16item standardized questionnaire.
The system usability scale sus provides a quick and dirty, reliable tool for measuring the usability. The system usability scale sus is the most widely used measure of usability. A participant, or user participant, is a user, potential, or user surrogate who helps evaluate ux designs for usability and user experience. Usability evaluation for drone mission planning in. For example, an average sus score for cell phones is around 67. The system usability scale sus is a 10item likert scale questionnaire that provides an ataglance look at the ease of use or lack thereof of. The sus is a 10 item questionnaire with 5 response options. The system usability scale, or sus, is a simple survey that provides a highlevel score for the usability of a product. Posttest questionnaires like the system usability scale sus are popular for both. 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 includes indepth information on selecting the correct format of study, deciding how many and what kind of users to test, and writing testing plans and tasks. The results from the system usability scale scored the subjective satisfaction with the system based on performance with these tasks to be.
Usability test plan shop and discover books, journals, articles. These two systems had the lowest usability scores, as measured by the system usability scale, and the lowest nurse satisfaction scores cho et al. 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. Average system usability scale sus score for each of the platform os combinations mapped to the acceptability span described by bangor et al. The system usability scale sus a reliable, lowcost usability scale that can be used for global assessments of systems usability.
System usability scale, sus, surveys, user satisfaction. Usability and usability testing at sas paul hankey, sas institute inc. Pssuq originated from an internal ibm project called sums system usability metrics in 1988. This and many other posts are also available as a pretty, wellbehaved ebook. At the end of the test the users responded to the 10item sus questionnaire. Scores range from 0 to 100, with a higher sus score indicating better usability. Major findings o details might include observations of user reactions to work flows. For each of the following statements, mark one box that best describes your reactions to the website today. To conduct a system usability scale, you will need participants to answer 10 questions on a likert scale thomas. Bwb test plan 6 qualitative users comments and questions users body language and facial expressions user responses to product reaction cards. Electronic health record ehr usability test report of. The system usability scale sus is a short, surveybased approach used to determine the usability of a system from an enduser perspective once a prototype is available for assessment.
Learn more about uses of system usability scale with examples of questions used in a sus questionnaire and also how to calculate sus score. Sus is technology independent and has since been tested on hardware, consumer software, websites, cellphones, ivrs and even the yellowpages. Cognitive therapeutic exercise, usability scale, touch panel interface, preventive care, rehabilitation 1. Abstract tem 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 applications, and more. 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.
Dod healthcare management system modernization dhmsm. A more advanced way to use the sus is to compare different designs. Sus the system usability scale in response to these requirements, a simple usability scale was developed. Among the strengths of this methodology, the planning of each of the steps of. The sus is a technology agnostic tool consisting of ten questions with five responses for each question ranging from strongly agree to strongly disagree. After all task scenarios were attempted, the participant completed the system usability scale, a subjective evaluation questionnaire designed to evaluate the usability of a product. Based on the scope of the project, guidance from ahrq and the technical expert panel, and factors identified through consideration of ehr capabilities. The test evaluation will include pretest, posttask, and posttest questionnaires, posttest interviews, eyetracking, and product reaction cards. The systems impressions questionnaire was adapted from the poststudy system usability questionnaire items from fruhling and lee 2005 and were used to assess system usefulness, information quality, and.
With the plans for integrating biometrics into many areas of government and public life, the importance of usability research has increased. Pdf we have developed a pictorial multiitem scale, called psus pictorial system. I would imagine that most people would learn to use this system. This questionnaire is used as a quantitative method to dwell upon the global view on the subjective assessment of usability. An overview of the system usability scale in library. The system usability scale sus is a tenitem rating scale for measuring perceived usability.
If you are conducting sus evaluation offline, please use the form below to generate printready questionnaire for your participants. If you would like to read john brookes research papers about the system usability scale, these can be retrieved from the sources below. It is often assumed that a likert scale is simply one based on forced. Since its introduction in 1986, the 10item system usability scale sus has been assumed to be unidimensional. The system usability scale sus is the most widely used standardized questionnaire for the assessment of perceived usability. The system usability scale sus is a 10question questionnaire that offers a quick. Pdf measuring the usability of mobile applications for.
Users gave mhs genesis usability an average score of only 37 out of 100 on the system usability scale sus, well below the threshold of 70 that indicates acceptable usability. How to use the system usability scale sus to evaluate. It was created by john brooke while he was working at digital equipment corporation in 1986 in the u. Measuring and interpreting system usability scale sus. The system usability scale sus questionnaire that was developed in english has been widely used in the literature for assessing perceived usability of interactive systems. Comparing sus scores across different stages of a project shows how usability is changing. Identify personnel who will oversee and assess the usability of medical equipment if an incident occurs. I think that i would like to use this website frequently. Results a score of 65 indicates greater than average usability. Sus can be used to quantify the usability of websites, apps, or any software or hardware that users interact with, wireframes and prototypes included. How to measure product usability with the system usability. A sus score appeals to stakeholders because it is simple, reliable and costeffective. After operating the vr interface, they were asked to fill out the questionnaire.
Measuring the perceived usability of a system using the system. How to use the system usability scale sus to evaluate the. Since then it has been used been in over 1,200 published studies measuring the usability of things as diverse as. John brooke developed the system usability scale at digital equipment. This study aimed to adapt the sus into turkish and investigate its validity and reliability. It is often assumed that a likert scale is simply one based on forcedchoice questions, where a statement is. System usability scale sus oa quick and dirt but trustable usability scale oinvented by john brooke in 1986 it measures the perceived usabilityof a system a 10item likert scale questionnaire oeach question has 5 response options it produces a score from 0100 onot equivalent to a percentage score. Pdf since its introduction in 1986, the 10item system usability scale sus has been assumed to be unidimensional.
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