How could Digital's collapse be so precipitous? It's because, in many ways, financial performance data is misleading. As you move up to the top of the market, you're getting rid of the less profitable products at the low end and adding business with more attractive margins at the high end. The rate of unit volume growth might be tapering off as you pursue these smaller markets, but your margins actually look better. So Wall Street rewards your stock price until you hit the ceiling.

It is a company's customers who effectively control what it can and cannot do.

We are all trained to be data driven people, but no hard data exist about the future. Therefore, the only way to look into the future with any degree of accuracy is to use theory, statements of what causes what and why. If executives have the right theories in their heads, they can very quickly interpret market developments. They can identify what matters and why, and act accordingly. So we suggest decision-makers should start by gaining a deep understanding of the relevant collection of theories, and then be alert for signals that indicate certain types of developments.

I don't view it as mystic. I believe that God is our father. He created us. He is powerful because he knows everything. Therefore everything I learn that is true makes me more like my father in heaven. When science seems to contradict religion, then one, the other, or both are wrong, or incomplete. Truth is not incompatible with itself. When I benefit from science it's actually not correct for me to say it resulted from science and not from God. They work in concert.

When a technology, regardless of how different and difficult it is, sustains the trajectory of performance improvement, my research asserts that the leaders in the prior generation of technology are likely to end up on top of their industry at the end of the transition.

Businesses want to think in terms of categories. Consumers want us to think in terms of their needs.

The answer is the disruptive innovator, an outsider, who creates a product or service for the non-existing consumer in a non-existing market for almost no profit.