UWEM

The Unified Web Evaluation Methodology (UWEM) is a standardized European methodology for evaluating web accessibility conformance with WCAG. Developed through EU-funded projects including the European Internet Accessibility Observatory (EIAO) and Support-EAM, UWEM provides detailed, reproducible test procedures for each WCAG checkpoint, specifying exactly how to check compliance both manually and through automated tools. By defining precise testing algorithms, UWEM aims to ensure that different evaluators and tools produce consistent results when assessing the same web content — addressing a known problem where different accessibility checkers often report different results for the same page. UWEM was particularly influential in enabling large-scale automated accessibility monitoring across European government websites and web archives.