Lean methodologies are a set of principles aimed at improving efficiency and reducing waste in various processes. Originating from the Toyota Production System, these methods focus on delivering value to customers while minimizing resources, time, and effort. Key concepts include continuous improvement, respect for people, and optimizing workflows. The core idea of lean is to identify and eliminate activities that do not add value, often referred to as "waste." By streamlining processes and enhancing collaboration, organizations can achieve better quality, faster delivery, and increased customer satisfaction, making lean methodologies applicable across industries, from manufacturing to software development.