Tools This page presents some of the (co-)developed tools that can help circular urban mining. BIM-based circularity assessment tool Impression of BIM-based circularity assessment tool (B-CAT) that offers actual insights into constructions’ degrees of circularity, taking different levels of detail into account. Construction supply chain management serious game Screenshot of serious game ‘Tower of Infinity’. This game offers a meaningful experience in a playful manner about construction supply chain management.