The Lean Six Sigma Approach to Continuous Improvement in the pharmaceutical industry emphasizes the importance of maintaining consistent quality and operational efficiency due to stringent regulatory requirements and the high cost of defects. This research investigates the practical implementation of Lean Six Sigma methodologies, specifically the DMAIC (Define, Measure, Analyze, Improve, Control) framework, in optimizing the tablet compression process for a specific type of medicine in tablet form, referred to as ABC tablets. The continuous improvement methodologies, rooted in the historical foundations of Six Sigma—which began with Carl Friedrich Gauss's concept of the natural curve and later evolved through Walter Shewhart’s quality control charts—are employed to systematically identify and address variability issues inherent in the manufacturing process using statistical tools such as control charts and cause-and-effect diagrams. Developed at Motorola in the late 1980s by Bill Smith and Mikhel Harry, the aim of the Six Sigma approach is to reduce variation in major product quality characteristics to levels where failure or nonconformities are extremely unlikely. By employing targeted interventions inspired by both Lean philosophy and Six Sigma principles, significant improvements in process capability, yield percentages, and defect rates are achieved. The findings also demonstrate a substantial reduction in variability, leading to increased process reliability and product quality; for instance, process capability indices improved, yield percentages rose from 85% to 95%, and defect rates dropped from 10% to 2%. This underscores the tangible impact of Lean Six Sigma methodologies on enhancing operational efficiency and product quality in pharmaceutical manufacturing. Additionally, the research highlights the importance of sustained improvements through rigorous control measures, ensuring long-term benefits and fostering a culture of continuous improvement within the industry.

This research serves as a valuable case study for the broader application of Lean Six Sigma in the pharmaceutical industry, providing a structured approach to process optimization and quality enhancement.