The pursuit of relevance and rigor in Design Science Research (DSR) has spurred collaborative methods that tightly integrate researchers and practitioners. Consortium Research (CR) has emerged as a structured approach operationalizing DSR in multi-organization settings, enabling the co-creation of artifacts that are both scientifically sound and immediately applicable. This paper examines how CR can be applied at scale in an enterprise-grade open source project, using the Eclipse Dataspace Components (EDC) project as a case study. We adopt the established CR and map it onto the open source context. The EDC case involves a multi-partner open source initiative for building dataspaces and inter-organizational data sharing, illustrating how CR facilitates knowledge exchange between academia and industry. Beyond relevance, the study emphasizes how open source initiatives can strengthen scientific rigor under conditions of increasing technological and organizational dynamism of research activities. The findings highlight that open source projects can serve as DSR engines that produce broadly applicable solutions and insights at scale. The paper delivers methodological guidance for researchers and contributes to the Design Science Research knowledge base by integrating practical insights from a real-world consortium setting.