Supplementary Information for "Platform Thinking for Circular Construction: When Digital Matchmaking Becomes a Socio-Technical Coordination Infrastructure"

This record contains supplementary information associated with the article “Platform Thinking for Circular Construction: When Digital Matchmaking Becomes a Socio-Technical Coordination Infrastructure”. The supplementary material documents the research materials used in the exploratory design science research study. It provides additional information on the conceptual matchmaking prototype, the guided walkthrough protocol, the post-session questionnaire, the practitioner evaluation process, and the development of practitioner-informed design principles. The material supports transparency and reproducibility by documenting how the conceptual artifact was presented, evaluated, and translated into design knowledge. The record includes the walkthrough protocol, questionnaire, prototype documentation, supplementary tables, and anonymized illustrative excerpts. Full interview recordings and transcripts are not included because they may contain identifiable professional or organizational information. The published material has been prepared to avoid disclosure of confidential or personally identifiable data. This supplementary information should be cited alongside the corresponding article when referring to the research protocol, prototype documentation, practitioner evaluation materials, or supporting design science research documentation.