This case study examines the integration of Lean Supply Chain Management (LSCM) and Industry 4.0 technologies in European manufacturing companies. The study aims to understand how digital technologies can enhance lean practices and improve supply chain performance. Key digital tools implemented include IoT sensors, data analytics, and cloud computing, which were used to monitor and optimize supply chain operations. Employee training and real-time monitoring systems were also critical components of the implementation process.The results indicate significant cost savings due to improved operational efficiency and reduced waste. Additionally, the integration led to environmental benefits, such as a reduction in carbon emissions and waste. Enhanced visibility and control over supply chain operations improved load stability and reduced product damage.The discussion highlights the practical benefits of integrating LSCM and Industry 4.0 technologies, including enhanced efficiency, environmental impact, and operational control. The study also provides insights into strategic integration, continuous improvement, and operational synergy. Current market trends indicate a synergistic effect between LSCM and Industry 4.0, aligning with the growing emphasis on green and sustainable processes.This case study offers valuable insights for industry practitioners and policymakers on the practical benefits and challenges of integrating LSCM and Industry 4.0 technologies, supporting the feasibility and proportional benefits of this integration for optimizing supply chain performance.