" Strategy Lessons • Not every innovation idea has to be a blockbuster. Sufficient numbers of small or incremental innovations can lead to big profits. • Don’t just focus on new product development: Transformative ideas can come from any function—for instance, marketing, production, finance, or distribution. • Successful innovators use an “innovation pyramid,” with several big bets at the top that get most of the investment; a portfolio of promising midrange ideas in test stage; and a broad base of early stage ideas or incremental innovations. Ideas and influence can flow up or down the pyramid. "

― Harvard Business School Press , HBR's 10 Must Reads on Innovation (with featured article “The Discipline of Innovation,” by Peter F. Drucker)