<p>This systematic literature review identifies how usability, accessibility, and user experience (UX) are evaluated and integrated throughout the lifecycle of digital web projects. The study is motivated by the need to clarify how these dimensions are currently addressed in practice, in response to increasing regulatory demands and the growing emphasis on inclusive digital design. Following PRISMA and Kitchenham guidelines, the review analyzes academic literature published since 2020, focusing on the methods, tools, and indicators used across different project phases. The findings reveal a predominance of automated tools and heuristic evaluations, with limited early-stage integration and insufficient attention to user diversity and legal accessibility requirements. The review synthesizes this evidence and underscores the need for unified, inclusive evaluation strategies. Drawing on frameworks such as the capability approach, universal design, and User-Centred Design, it offers practical recommendations for aligning digital quality criteria with legal standards such as WCAG and EN 301 549. The paper concludes by proposing future directions aimed at developing integrated evaluation models and robust indicators to support inclusive, compliant, and user-oriented digital services.</p>