The transition toward sustainable industrial systems has underscored the necessity of integrating Circular Economy (CE) principles with Industry 4.0 technologies. Despite expanding studies in both fields, an integrated and process-oriented framework that explains the systematic interaction of these approaches to enhance sustainable performance remains absent in the existing literature. This research aims to identify existing gaps and propose an integrated conceptual framework for improving sustainable performance based on the synergy between CE and Industry 4.0.
Employing a systematic literature review (SLR) following Sandelowski and Barroso’s seven-step approach, a systematic search was conducted across reputable international databases for the period 2015–2026. After applying inclusion and exclusion criteria, selected articles were analyzed. A total of 407 initial codes were extracted and, following conceptual refinement, organized into 49 indicators and 33 criteria. These indicators were categorized into five sustainable performance improvement processes: procurement, design and development, production and operations, distribution and use, and maintenance.
Findings reveal that the literature focuses predominantly on production and operations, while upstream and midstream value chain processes remain under-explored. The proposed framework demonstrates that Industry 4.0 technologies act as enablers for implementing the ten principles of the Circular Economy. By rearranging five organizational processes, these technologies simultaneously enhance the economic, environmental, and social dimensions of sustainable performance. The research's novelty lies in providing an integrated, process-oriented model that elucidates the mechanisms for achieving practical sustainable performance through the nexus of CE and Industry 4.0.