Eliyahu M. Goldratt was an educator, author, physicist, philosopher and business leader. He is best known as the father of the Theory of Constraints (TOC), a process of ongoing improvement that continuously identifies and leverages a systems constraints in order to achieve its goals. An advisor to major corporations and government agencies around the world, Dr. Goldratt was heralded as a guru to industry by Fortune magazine and a genius by Business Week. In addition to The Goal, he authored ten other books, including four business novels. He developed TOC-derived tools such as Drum-Bu?er-Rope, Critical Chain Project Management (CCPM) and the Thinking Processes, and continued to advance the TOC body of knowledge until his death in 2011.