( a.k.a., user-friendliness)(1) a user-oriented security quality requirement specifying the degree to which an application or component (e.g., user interface, help facilities) and its documentation shall enable a specified set of users to easily and efficiently: Learn and remember how to use it. Perform a specified set of their tasks while making a minimum number of errors (e.g., create and inputs, obtain and understand outputs).(2) a quality factor measuring the degree to which an application or component actually enable users to easily and effectively use it.

Usability is the art and science of designing systems or products that are effective, efficient, engaging, error tolerant and easy to learn. Usability and accessibility are often confused. Some believe that a usable site is accessible and vice versa. The two are not exclusive, but it is important to understand the difference. Usability means that a Web site is intuitive and easy to use. Accessibility means a Web site is as barrier-free as possible. Accessibility and usability are closely related, as they both improve satisfaction, effectiveness, and efficiency of the generic user population. But while accessibility is aimed at making the website open to a much wider user population, usability is aimed at making the target population of the website happier, more efficient, more effective.

Extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use. Factors which affect usability on the web are layout, content, navigations, load times, colors, and technical issues such as accessibility, code format and code structure. It depends upon the purpose and target audience of a particular site. However, there is general agreement that a usable Web interface is one that is accessible, appealing, consistent, clear, simple, navigable and forgiving of user blunders.

(see Web site usability)

Usability refers to the ease with which a User Interface can be used by its intended audience to achieve defined goals. Usability incorporates many factors: design, functionality, structure, information architecture, and more.

The measure of a product's potential to accomplish the goals of the user. For example: ease of use of a website.

Usability is a generic term that refers to design features that enable something to be user-friendly.

The ease of which a user can interpret and respond to information.

Ease of use, or usability, is an important criteria when evaluating tools or controls from an ergonomic perspective. Many factors, including the location, size, shape, and adjustability may affect usability.

Refers to the 'user friendliness' of a web site. A site with high levels of usability is easy to navigate, consists of a clean and logical design and is designed with visitors in mind rather than fellow designers.

The degree to which a web page or site is easy or difficult to use. This involves several factors including the navigation structure (including search facilities, indices, tables of content, etc.), the use of graphics, page layout, clarity of expression, etc. Testing is conducted with a typical target audience to see if they can find what they want easily or if changes need to be made.

efficiency with which a user can perform required tasks with a product, for example, a website. Usability can be measured objectively via performance errors and productivity, and subjectively via user preferences and interface characteristics. Web design features that affect usability include navigation design and content layout.

The concept of making something easy enough to understand that an average person can use it without becoming frustrated.

The potential of a website to return value to its users as quickly and easily as possible.

Usability refers to the practical factors that must he considered in selecting a test÷for example, cost, time, ease of administration, and ease of scoring.

The measure of ease-of-use and satisfaction a visitor encounters on a web site.

how easy it is for a user to do what they want to do with a computer program.

User friendliness. A discipline which, via various test methods, focuses on the user, making it possible for the user to perform various tasks as easily as possible.

Usability is a property of websites (and other systems and products) that relates to ease of use. Usability is commonly defined as having three core components: effectiveness (how well a task can be completed), efficiency (how easy or quick it is to complete the task), and satisfaction (the user's perception or opinion of the system).

Refers to design features that make a product user friendly. For instance, Web sites with usability problems could be hard to navigate, difficult for disabled people to use, or have unclear instructions for use.

The effectiveness, efficiency, and satisfaction with which specified users can achieve specified goals in a particular environment. Synonymous with "ease of use".

Analysis of the ease with which a function and/or interface can be understood and controlled by a user.

The clarity with which the user interface of a computer program or a web site is designed.

The degree to which a software application or a website is easy to use with no specific training

How easy a Web site is to use.

A set of properties that makes something easy to use.

A measurement of how easy an application is for callers to use. The measurement is made by making observations and by asking questions. An application should have high usability to be successful.

the quality of being not only functional but also suitable to the user's task and easy to learn; a key principle of user-interface design.

The extent to which the voice application or service can be used by specified callers with effectiveness, efficiency and satisfaction; also, the proactive of studying a system's usability.

The measure of how easy it is to use a web site or other e-learning materials. If it is difficult for user to navigate or to find the information they want, then the online education materials are said to have poor usability.

The ease and intuitiveness of a product or service. Low usability will require more support for Users. There are documented and proven approaches to designing and measuring usability.

In the context of this site, usability refers to how easy it is for a user to find the information they need or to complete an action on a given website.

The ease of use of a website, or any other product. Usability encompasses many different disciplines, from Cognitive Psychology to graphic design.

The measure of how effectively, efficiently, and easily a person can navigate an interface, find information on it, and achieve his or her goals.

Usability in its most basic definition is the ability to effectively use a web site.

Usability is a generic term that refers to the ability of a system, an interface, or content to be user-friendly.

The International Standards Organization defines usability as, "The extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use."

The measure of the quality of a visitor's experience when using a website, including the ability to accomplish basic tasks.

A generic term that refers to design features that enable a web site to be user-friendly. This generally refers to how easily a user can find their way around a site. There are five basic components to usability according to Jacob Nielson (known as THE authority on usability): Learnability: How easy is it for users to accomplish basic tasks the first time they encounter the design? Efficiency: Once users have learned the design, how quickly can they perform tasks? Memorability: When users return to the design after a period of not using it, how easily can they reestablish proficiency? Errors: How many errors do users make, how severe are these errors, and how easily can they recover from the errors? Satisfaction: How pleasant is it to use the design? Usability also refers to the W3C's accessibility guidelines for people with disabilities.

(IEEE) The ease with which a user can learn to operate, prepare inputs for, and interpret outputs of a system or component.

The quality of designing a web site or application that addresses how easily users can accomplish specific tasks.

The quality of a system, program, document or device that enables it to be easily understood and conveniently employed by a user.

How easy it is to find, understand, and use the information displayed on a Web site.

A set of attributes that bear on the effort needed for use, and on the individual assessment of such use, by a stated or implied set of users. (ISO 9126: 1991, 4.3)

Refers to the level or degree of a page's operating friendliness for the user.

The capability of the software product to be understood, learned, used and be of value to the user, when used under specified conditions.

The degree to which the intended target users can accomplish their intended goals.

Usability is the effectiveness, efficiency, and satisfaction with which specified users achieve specified goals in particular environments. a) Effectiveness is the accuracy and completeness with which specified users can achieve specified goals in particular environments. b) Efficiency comprises the resources expended in relation to the accuracy and completeness of goals achieved. c) Satisfaction is the comfort and acceptability of the work system to its users and other people affected by its use.

The effectiveness, efficiency and satisfaction with which specified users can achieve specified goals in specified environments. (ISO DIS 9241-11)

That quality of a system that makes it easy to learn, easy to use and encourages the user to regard the system as a positive help in getting the job done. User A person who uses a system to perform a business function.

Generally refers to ease-of-use of something, typically websites. Usability is often measured by such things as time to complete a given task, level of satisfaction with the process of completing the task, and whether the user is able to accomplish his or her goals efficiently. (See Heuristic Evaluation.)

Web usability measures the effectiveness and efficiency of a Web site. Usability also evaluates the satisfaction of site visitors. We can only measure Web site usability with direct input from primary users.

An evaluation and measurement of a computer program's overall ease-of-use.

The degree to which a product empowers its users to reach their goals in an effective, efficient, and satisfactory manner.

Refers to how easy a technology is to learn and use in order to get a job done. This can be measured in terms of productivity, safety or simply comfort of the operators in accomplishing the task.

Making a website usable means ensuring that it is designed to be as user friendly and simple to use as possible.

The idea that a web site or web page is easily used by a web user.

the ease with which visitors are able to use a web site.

A measure of the degree to which a product can be used by specified users or groups to achieve specific goals of effectiveness, efficiency, and satisfaction in a specified context of use. Factors affecting this measure include learnability, readability, aesthetics, safety and error frequency. Another significant factor is keeping cost-effectiveness within acceptable levels for human cost measured in terms of tiredness, discomfort, embarrassment, frustration and personal effort. Keeping cost-effectiveness within acceptable levels increases user satisfaction, which in turn causes continued and enhanced usage of the system. SEE LEARNABILITY, READABILITY AND TESTING

Usability is a term used to denote the ease with which people can employ a particular tool or other human-made object in order to achieve a particular goal. Usability can also refer to the methods of measuring usability and the study of the principles behind an object's perceived efficiency or elegance.