" The patterns of success and failure we see among firms faced with sustaining and disruptive technology change are a natural or systematic result of good managerial decisions. That is, in fact, why disruptive technologies confront innovators with such a dilemma. Working harder, being smarter, investing more aggressively, and listening more astutely to customers are all solutions to the problems posed by new sustaining technologies. But these paradigms of sound management are useless—even counterproductive, in many instances—when dealing with disruptive technology. "

― Clayton M. Christensen , The Innovator's Dilemma: The Revolutionary Book that Will Change the Way You Do Business