This document discusses lean manufacturing and its principles. It defines lean as an improvement process and philosophy aimed at eliminating waste. The lean goal is to achieve the highest quality, lowest cost, and shortest lead time. There are eight types of waste identified, and essential lean tools discussed include 5S, just-in-time, kaizen, single-minute exchange of dies, and standard work. The document outlines five steps to lean implementation and provides examples of lean manufacturing increasing delivery by 26%, stock turns by 33%, and productivity by 25%. It concludes that lean is effective if properly applied but requires establishing a lean system and planning for implementation.