Small businesses often pay little attention to the continuous improvement of production processes, which negatively impacts productivity and market competitiveness. This study aimed to implement the 5S methodology as a Lean Manufacturing tool in the roller shade production area of an SME, focusing on optimizing resource utilization and improving workflow. The initial diagnostic phase involved the use of an Ishikawa diagram to identify the main causes of inefficiency. The implementation process began with the use of red tags during the Sorting (Seiri) phase and progressed through to the final Discipline (Shitsuke) phase. Implementation was validated using Arena simulation software. The results showed an increase in labor productivity from 0.6 to 0.8 and a 33.3% improvement in meeting the production plan, demonstrating the effectiveness of this methodology in achieving sustainable improvements.