Development of the BCEF and DeCon Tools

This expert consultation report documents the development and validation of two interconnected tools aimed at enhancing circularity assessment in the building sector: the Building Circularity Evaluation Framework (BCEF) and the Expert System for Disassembly (DeCon). The report consolidates insights from multiple stakeholder workshops and structured expert interviews conducted between October 2024 and February 2025 with key partners including the Colruyt Group and the Sustainable Building Design Lab at the University of Liège. The consultations aimed to ensure the methodological robustness, operational feasibility, and industry relevance of both tools. Specific attention was given to selecting meaningful indicators for circularity assessment, validating disassembly criteria, and evaluating integration strategies with existing life cycle assessment (LCA) and building information modeling (BIM) workflows. Findings from these sessions contributed directly to refining indicator sets, prioritizing automation, and enhancing user experience in real-world contexts. The outcomes provide a practical foundation for architects, engineers, and sustainability practitioners committed to advancing circular building design and end-of-life adaptability.