High Quality Content by WIKIPEDIA articles! Eliyahu Moshe Goldratt (March 31, 1947 - June 11, 2011) was an Israeli physicist who became a business management guru. He was the originator of the Optimized Production Technology, the Theory of Constraints (TOC), the Thinking Processes, Drum-Buffer-Rope, Critical Chain Project Management (CCPM) and other TOC derived tools.