IDS-Based Accessibility Validation in BIM Using ISO 21542:2021 Door Criteria: A Case Study of the Urla Summer Villa

Building Information Modeling (BIM) has become a central paradigm in the architecture, engineering, and construction industry, enabling integrated management of design and construction data. Accessibility standards are essential to ensure inclusive and usable built environments, yet manual verification of ISO 21542:2021 criteria in BIM models is time-consuming and error-prone. Following the formal standardization of the Information Delivery Specification (IDS) in 2024, this study investigates its potential for systematic accessibility validation. Using the Design Science Research methodology, ISO 21542 door requirements were translated into IDS format and applied to the Urla Summer Villa case. The workflow integrated IDS Maker for XML rule definition, ArchiCAD for BIM, and BIMvision with the IDS Checker plugin for automated validation. The evaluation revealed an overall compliance rate of 50%, with non-compliances in door width, height, threshold, and handle parameters. Results indicate that IDS can detect accessibility inconsistencies early, provide transparent reporting, and strengthen quality assurance in BIM-based design processes. This study contributes to expanding the limited corpus of accessibility-focused IDS applications and highlights IDS as a practical tool for advancing inclusive design practices within digital construction workflows. The study is limited to a single case and door elements only, within a specific software ecosystem. Future research should extend IDS-based accessibility validation to ramps, stairs, elevators, and diverse BIM platforms to strengthen generalizability.