Kaoru Ishikawa (born July 15, 1915, in Tokyo, Japan) was a prominent Japanese organizational theorist and quality management innovator. Renowned for his contributions to the development of quality control techniques, he played a key role in shaping modern quality management practices. Ishikawa is best known for his advocacy of the fishbone diagram (also called the Ishikawa diagram), a tool used for root cause analysis in quality improvement processes. His work has had a lasting impact on industrial and organizational quality standards worldwide.
This is classic management book which first describes Ishikawa's Cause and Effect Fishbone diagram. Ishikawa is credited for making the Japanese motor industry successful