Metcalfe’s law: the value of a network as a whole is proportional to the square of the number of participants. In other words, the more people in the… - Eric Ries

make a sharp turn called a pivot or whether we should persevere along our current path.

This led to some frustrating board meetings at which we could show great product “progress” but not much in the way of business results.

Only 5 percent of entrepreneurship is the big idea, the business model, the whiteboard strategizing, and the splitting up of the spoils. The other 95 percent is the gritty work that is measured by innovation accounting: product prioritization decisions, deciding which customers to target or listen to, and having the courage to subject a grand vision to constant testing and feedback.