Kaizen is a Japanese philosophy of continuous improvement involving employees at all levels. The document discusses Kaizen and its implementation through a step-by-step process. Kaizen was introduced in Japan after WWII to help rebuild the country and improve management skills. It involves standardizing operations, measuring performance, innovating to meet requirements, and continually repeating the cycle. Kaizen is used extensively in product development to design efficient manufacturing processes. It employs lean thinking and has been shown to reduce costs, space needs, and improve worker satisfaction through its success in pull cellular manufacturing systems.