Tom Peters is a management consultant, author, and lecturer. He founded the Tom Peters Company in California in the early 1980s. His books focus on successful corporate practices.

Dr. Hammer is a management consultant, author, lecturer, former MIT computer science professor, and president of Hammer and Company in Cambridge, Massachusetts. He is the originator of the business concept called “reengineering,” which in the 1990s encouraged many companies to restructure themselves.

Dr. Eliyahu Goldratt is an Israeli physicist, business consultant and chairman of the Goldratt Institute in New Haven, Connecticut. He is a recognized leader in developing new management concepts and systems.

Peter Drucker is a management consultant, economist, author, and teacher specializing in strategy and policy for businesses and nonprofit organizations and in the work and organization of senior management.

Deming (1900–93) was a mathematical physicist, a teacher, and a management consultant. He had a significant impact on business managers, first in Japan and then in the United States. He was an advocate of QUALITY CONTROL methods and industrial PRODUCTION.

Stephen Covey is a lecturer, author, and founder of the Covey Leadership Center in Provo, Utah. He focuses on subjects including leadership and personal and organizational effectiveness.