Competing Against Luck: The Story of Innovation and Customer Choice

by Clayton M. Christensen

other. As Nate Silver, author of The Signal and the Noise: Why So Many Predictions Fail—But Some Don’t, points out, “ice cream sales and forest fires are correlated because both occur more often in the summer heat. But there is no causation; you don’t light a patch of the Montana brush on fire when you buy a pint of Häagen-Dazs.” Of course, it’s no surprise that correlation isn’t the same as causality. But although most organizations know that, I don’t think they act as if there is a difference. They’re comfortable with correlation. It allows managers to sleep at night. But correlation does not reveal the one thing that matters most in innovation—the causality behind why I might purchase a particular solution. Yet few innovators frame their primary challenge around the discovery of a cause. Instead, they focus on how they can make their products better, more profitable, or differentiated from the competition. As W. Edwards Deming, the father of the quality movement that transformed manufacturing, once said: “If you do not know how to ask the right question, you discover nothing.” After decades of watching great companies fail over and over again, I’ve come to the conclusion that there is, indeed, a better question to ask: What job did you hire that product to do? For me, this is a neat idea. When we buy a product, we essentially “hire” something to get a job done. If it does the job well, when we are confronted with the same job, we hire that same product again. And if the...