Iso have released a new standard for measuring the usability of every day products, like ticket machines, mobile phones and digital cameras. Many authors propose different approaches to implement and assemble the. Measuring the user experience provides the first single source of practical information to enable usability professionals and product developers to effectively measure the usability of any product by choosing the right metric, applying it, and effectively using the information it reveals. It consists of a 10 item questionnaire with five response options for respondents. This used to be called simply user satisfaction but in fact, since when it first came out in the 1990s, sumi has always actually been measuring user experience sumi defined user experience with workbased software products in 1995.
The elements are like components which can be associated in different ways to make a. System usability and measuring user satisfaction 2. Software design responsiveness involves the timeliness of the software products response to user inputs, external interface stimuli, or interactions with elements of the computing environment. Laser measure is a fully featured, easytouse tool, with a display guide that uses words, letters and icons to walk the user through each measurement process.
Reassessing the usability metric for user experience. The conventional assumption that quality is an attribute of a product is misleading, as the attributes required for quality will depend on how the product is used. The software structural design must be evaluated to determine if the design can be enhanced to improve the software products responsiveness to requested actions. Measuring usability as quality of use springerlink. Tullis and albert, the authors of our text, measuring the user experience, dedicate the majority of their book to metrics from definition and types to use and measurement. As previously mentioned, from the three measurable concepts related to software component usability quality of the documentation, complexity of the solution and complexity of the problem we will just consider the first two.
System usability scale sus originally created by john brooke dec in 1986, sus is one of the best known standardized usability rating scales. The system usability scale sus was released into this world by john brooke in 1986. System usability scale sus usability body of knowledge. Quality of use can be used to measure usability as the extent to which specific goals can be. The main goal is to create a set of reusable software components for the rapid production of a software systems family. The bosch activeschematics software renders automatically in a few seconds nongraphical wiring data into a visual wiring diagrams. Method for measuring the usability of a system and for. The quality in use integrated measurement quim model is a consolidated approach for measuring usability through 10 factors, 26 criteria, and 127 metrics. Sum is a standardized average of measures of effectiveness, efficiency of satisfaction and is typically. A objectoriented development b componentbased development c structured methodologies d rad. Measuring the usability of software components sciencedirect. The system usability scale sus is a standardized metric for measuring the usability of a website or other interactive system.
Are you trying to ensure optimal usability for a new piece of functionality. The usability of a product is contextual and depends on the different roles of users, environments and tasks they need to do. Its important to measure effectiveness relative to these and to make sure we have quantitative and qualitative data to help us collect information and compare against benchmarks. Quality of use is therefore defined as the extent to which a product satisfies stated and implied needs when used under stated conditions. Pdf measuring the usability of software components. In software engineering, usability is the degree to which a software can be used by specified consumers to achieve quantified objectives with effectiveness, efficiency, and satisfaction in a quantified context of use. However, these methods define usability inconsistently, which makes software engineers hesitant in implementing these methods or standards. You do not need a formal lab, a room with the necessary equipment will suffice. Unified modeling language the unified modeling language uml is a general purpose, developmental, modeling language in the field of software engineering, that is intended to provide a standard way to visualize the design of a system. It has become an industry standard with references in over 600 publications.
They based their study on the isoiec 9126 30 model that defines usability in terms of five sub. The effect of experience on system usability scale ratings. Usability testing metrics involve 1 a user, 2 doing something, 3 with. Usability is a controlled aspect of user experience design that ensures the enduser doesnt strain or encounter problems with the use of a product or websites user interface. This development is exciting because the standards. The system usability scale sus provides a quick and dirty, but a reliable tool for measuring the usability.
Measuring usability with the system usability scale sus. This standard, iso 20282, includes test methods for quantifying the usability of consumer products to ensure they meet a predefined quality level. The easytoread backlit color display improves the visibility and usability of the laser measure. It focuses on providing lightweight 10 questions subjective feedback from users. A representation of the various tasks and their interrelationships on a site. Authors tullis and albert organize dozens of metrics into six categories. Usability testing measures the suitability of the software for its users, and is directed at measuring the effectiveness, efficiency and satisfaction with which specified users can achieve specified goals in particular environments or contexts of use. A method for quantitatively and objectively measuring the usability of a system. Jeff wrote handbook of usability testing, one of the seminal books about usability testing, at a time when it was very unusual for companies to invest resources in performing a reality check on the usability of. The last decade marked the first real attempt to turn software development into engineering through the concepts of component based software development cbsd and commercial offtheshelf cots components, with the goal of creating highquality parts that could be joined together to form a functioning system.
Generally, software measurement is considered as a management tool which if conducted in an effective manner, helps the project manager and the entire software team to take decisions that lead to successful completion of the project. Download pdf version 300kb usability is not a luxury. The system usability scale sus is one of a number of industry standard usability questionnaires sumi, quis, use, etc. The method provides quantitative measures for usability satisfaction, usability performance, and usability performance indicators. System usability and measuring user satisfaction 1. If your website drives revenue, no matter how big or small, you have a vested interest in turning motivated users into buyers, and that requires understanding the needs and expectations of those users. After building user experience groups in several companies and consulting with dozens of corporations on software product usability, ive settled on the sus a cornerstone to user experience metrics programs. Us5724262a method for measuring the usability of a. These measurable concepts and their related attributes are presented in table 1. Citeseerx measuring the usability of software components. Usability satisfaction is measured by acquiring data from a system user population with respect to a set of critical factors that are identified for the system. The average rating on these six statements is regarded as the users usability rating of the interaction component.
Metrics come in very handy when it comes to quantify usability during the usability evaluation of software, websites and applications. The usability metric for user experience umux scale is a new addition to the set of standardized usability questionnaires, and aims to measure perceived usability employing fewer items that are in closer conformity with the iso 9241 1998 definition of usability finstad, 2010. 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. In a modern automobile there are as many as 40 50 sensors measuring devices used in implementing various functions necessary to the operation of the car. Based on lab studies with difficult to use interaction components and easy to use interaction components, a breakeven point of 5. Heretofore, there has been no quantitative and objective method for measuring the usability of a system. Usability is commonly recognized as one of the most important quality factors of information systems. 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. A user experience designer can control accessibility, user interface, information architecture and usability to suit the uncontrolled aspects like goals, user lifestyle and habits. A metric is commonly defined as a way of measuring or evaluating a particular phenomenon or thing p. Methodology system usability scale measurement tool. Usability can be described as the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently while enjoying the experience. Sus is technology independent and has since been tested on hardware, consumer software, websites, cellphones, ivrs and even the yellowpages.
Different usability models for traditional information systems have been proposed. Accordingly questions such as how to measure the usability of wbis and. Measuring the usability of software components request pdf. There are many reasons why you would measure usability. Measuring the user experience chapter 3 planning a usability study collecting, analyzing, and presenting usability metrics 2 introduction what are the goals of your usability study. Citeseerx document details isaac councill, lee giles, pradeep teregowda. The software usability measurement inventory is a rigorously tested and proven method of measuring software quality from the end users point of view. Measuring the usability of software components article in journal of systems and software 793. One of the most critical processes of componentbased software development cbsd is the selection of the set of components either from in. Baseline usability testing involves watching as people go through a series of steps to use. Are you benchmarking the user experience for an existing product.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The sus is a 10 item questionnaire with 5 response options. Groups of objects are assembled into software components for common functions, which can be combined into largescale business applications, in which type of software development. The tool can be entirely integrated into tool suites for engineering, service documentation and diagnostics. Usability metrics a guide to quantify the usability of. A metric is a system or standard of measurement represented in units that can be utilized to describe more than one attribute. Usability indicators for software components manuel f. The way in which these measurable concepts influence the usability of a component and its. There are times when it is easier to describe the usability of a system or task by combining metrics into a single score, for example, when comparing competing products or reporting on corporate dashboards. The current movement towards webbased information systems wbis necessitates the need for special usability models for these systems.
535 621 1472 53 1252 325 622 179 1407 10 1019 1431 701 111 439 763 663 624 279 833 1182 838 962 423 323 806 569 794 488 1163 345 31 1324 709 978 1121