This book presents a comprehensive, practitioner-focused framework for applying Lean Six Sigma (LSS) within the chemical and pharmaceutical process industries?sectors that have historically been underserved by mainstream LSS literature. While most existing resources concentrate on discrete manufacturing, this work addresses the distinct challenges of process-driven environments, including complex batch operations, stringent regulatory requirements, and variability in raw materials and formulations. By adapting core LSS tools, such as DMAIC, SMED, Heijunka, and Visual Management, to these realities, the book provides a practical roadmap for achieving operational excellence where precision, compliance, and adaptability are essential.Unlike theoretical texts, this book is grounded in decades of hands-on experience and enriched with case-based insights, making it a practical guide for professionals at all levels?from plant managers to operational excellence leaders. This work fills a critical gap in the LSS literature by offering a tailored, experience-based approach specifically designed for process industries. It empowers organizations to move beyond generic frameworks and implement LSS in ways that align with their operational realities and strategic objectives. With its unique blend of technical rigor, practical relevance, and industry-specific focus, this book serves as an essential resource for professionals seeking to drive sustainable performance improvements in complex, regulated environments.