David Scott Duncan is a managing director at Innosight, where he works with leaders to create customer-centric teams, strategies, and organizations. He is the coauthor of two previous books, including the Wall Street Journal bestseller Competing Against Luck: The Story of Innovation and Customer Choice, written with the legendary Harvard Business School professor Clayton Christensen. A leading authority on the theory and application of jobs to be done, Duncan has extensive experience conducting market investigations around the world. Prior to his consulting career, he earned a PhD in physics from Harvard University. He lives with his family in East Greenwich, RI.