James P. Womack and Daniel T. Jones. Lean Thinking, Simon and Schuster, 1996Umble an Srikanth. Synchronous manufacturing, Principles for World Class Excellence, South Western Publishing Company, Cincinnati, Ohio, 1990Eliyahu M Goldratt and Jeff Cox. The Goal, North River Press, 1993 / 2002Harold O, etc. Fried. Measurement of Productive Efficiency: Techniques and Applications, OXF UP (NY). 1993.