Lean manufacturing is a systematic approach to maximizing customer value while minimizing waste across the entire production value stream. It defines value as what customers will pay for and identifies waste—such as overproduction, waiting, defects, excess inventory, and underutilized talent—as anything that does not add value. Rooted in concepts from early efficiency thinkers through the Toyota Production System, lean emphasizes continuous improvement (kaizen), just-in-time production, standardized work, and empowering employees to solve problems. A core five-step cycle focuses on defining value, mapping value streams, improving flow, enabling demand-driven “pull,” and continuously refining processes. Modern lean integrates digital tools and IoT to enhance data collection, quality control, and operational efficiency, making it an ongoing, organization-wide discipline.

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