This paper investigates the application of lean manufacturing concepts in the manufacturing process of empty fruit bunch (EFB) washed pellets intended for use as fuel in co-firing with coal at thermal coal power plants. The paper highlights the increasing demand for sustainable energy sources and the potential of biomass pellets, particularly EFB pellets, in reducing greenhouse gas emissions. The papers emphasize the importance of optimizing the manufacturing process to enhance efficiency, reduce waste, and ensure product quality. Through a comprehensive review of lean manufacturing principles and their relevance to biomass pellet production, the study aims to propose strategies for improving the EFB pellet manufacturing process. By integrating lean methodologies such as value stream mapping and continuous improvement, the paper seeks to enhance productivity, reduce production costs, and increase competitiveness in the biomass fuel market for power plant consumption. The findings are expected to provide valuable insights for stakeholders in the renewable energy sector seeking to implement lean practices to optimize their manufacturing processes.