C. M. Chang, PhD, MBA, is an adjunct professor emeritus at the Department of Industrial and Systems Engineering, State University of New York at Buffalo, NY, where he has taught engineering management for over 25 years and served, for a brief period of time, as its director of service engineering master degree program, after having retired from Praxair, a Fortune 100 company after 25 years. He holds five U.S. patents and has published a large number of technical articles in journals and conference proceedings, including the First Edition of "Engineering Management: Challenges in the New Millennium," which won the "Best IAMOT Book Awards of 2007," and "Service Systems Management and Engineering: Creating Strategic Differentiation and Operational Excellence," which won the "Best IAMOT Book Awards 2011," plus several other books. He also is a registered professional engineer.