H. William Dettmer is a professional management consultant. His clients include Fortune 500 companies such as Lucent Technologies, Weyerhaeuser, NEC America and Ericsson Cellular, as well as the U.S. Navy and the Department of Commerce's Management Extension Partnership. He learned the Crawford Slip Method directly from C.C. Crawford in the 1980s and has applied it to solve complex problems, develop strategy and plan its implementation. A retired Air Force pilot, Dettmer is a student of maneuver warfare and the philosophy of John Boyd. He holds a Master of Science in Systems Management from the University of Southern California and is the author of four books on constraint management: Goldratt's Theory of Constraints (1997), Breaking the Constraints to World-Class Performance (1998), Manufacturing at Warp Speed [with Eli Schragenheim] (2000), and Strategic Navigation (2003).