This thesis explores how lean manufacturing principles can be applied to improve production efficiency in the assembly of the Roller Coating Line (RCL) machine at Bürkle Industries. The study identifies key inefficiencies in the current production process using Multi-Moment Analysis (MMA) and Time Study methods, revealing significant amounts of non-value-adding activities such as excessive motion, transportation, and tool searching. To address these issues, a new lean-based workstation model was developed, structured around the PDCA (Plan-Do-Check-Act) cycle and supported by tools like 5S, standardization, and Just-in-Time (JIT) principles. The redesigned production layout and material handling system helped streamline workflows and reduce waste. Post-implementation results showed notable improvements in lead time, efficiency, and worker productivity. The study concludes that lean techniques, when systematically applied, can significantly enhance operational performance in complex manufacturing environments. It also provides practical recommendations for sustaining long-term continuous improvement through employee involvement and visual management.