W. Edwards Deming

William Edwards Deming (October 14, 1900 – December 20, 1993) was an American statistician, professor, author, lecturer and consultant. He is perhaps best known for the “Plan-Do-Check-Act” cycle popularly named after him. In Japan, from 1950 onwards, he taught top management how to improve design (and thus service), product quality, testing, and sales (the last through global markets) through various methods, including the application of statistical methods.