Glossary

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Acceptance Testing(also: User Acceptance Testing, UAT, Acceptance Tests)

A form of software testing that validates whether a system meets its specified requirements from the end user's perspective. In accessibility, acceptance tests simulate real user interaction scenarios — such as navigating a web page using only the keyboard or activating…

Accessibility Bug Report(also: ABR, Accessibility Defect Report)

A bug report that specifically documents an accessibility barrier or failure in software. These reports describe issues that prevent or hinder people with disabilities from using an application, such as missing alternative text, unlabeled form controls, keyboard navigation…

Accessibility Certification(also: Third-Party Accessibility Certification, Accessibility Accreditation)

A formal assessment and endorsement of a website or digital product's accessibility by an independent third-party organisation, as distinct from voluntary self-declaration of conformance. Certification schemes exist in several European countries with different national…

Accessibility Evaluation(also: Accessibility Audit, Accessibility Assessment, Accessibility Review)

The process of assessing whether a digital product, website, or application meets accessibility standards and is usable by people with disabilities. Accessibility evaluation typically combines automated testing tools (which can check technical requirements like image alt text…

Accessibility Evaluation Method(also: AEM, Accessibility Testing Method)

A structured approach or procedure used to assess the accessibility of digital products, websites, or applications. Accessibility evaluation methods include conformance review (checking against standards like WCAG), barrier walkthrough (assessing barriers in context of specific…

Accessibility Metric(also: Web Accessibility Metric, Accessibility Score)

A quantitative measure used to assess and compare the accessibility quality of web pages or websites. Accessibility metrics typically calculate a score (often 0-100%) based on the number and severity of WCAG violations found, weighted by conformance level (Level A weighted…

Accessibility Monitoring(also: Web Accessibility Monitoring, Accessibility Observatory)

Accessibility monitoring is the ongoing process of tracking and measuring the accessibility level of websites or digital products over time. Because web content is frequently updated, changes can inadvertently introduce new accessibility barriers or degrade previously achieved…

Accessibility Testing(also: A11y Testing)

The practice of evaluating software, websites, or digital products to ensure they can be used by people with disabilities, including those using assistive technologies such as screen readers, voice recognition, and switch devices. Accessibility testing encompasses automated…

Automated Evaluation Tool(also: AET, Automated Testing Tool, Accessibility Checker)

Software that automatically scans websites, applications, or documents to detect accessibility violations against standards such as WCAG or Section 508. Common examples include WAVE, axe, AChecker, and Lighthouse. While these tools can efficiently identify many technical…

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