Taiichi Ohno (1912 to 1990) was a Japanese industrial engineer and businessman, and one of the most quietly influential figures in modern industry. He is regarded as the father of the Toyota Production System, the approach to manufacturing that went on to inspire Lean Manufacturing in the United States.
Ohno’s great contribution was a way of seeing waste. He identified the seven wastes – muda, in Japanese – as part of the system, and he set out his thinking in several books, including Toyota Production System: Beyond Large-Scale Production. Few engineers can claim to have changed how the world thinks about work itself; Ohno has a better claim than most.