Ken Favaro, Cass R. Sunstein, Reid Hastie

Leaders also have to understand that group decision making falls into two distinct steps, which require different approaches. In the first step — identifying solutions — divergence is necessary. The group has to be encouraged to explore boundaries, search broadly, and expand its thinking in order to find the best options for the problem at hand. But the second step, in which the group selects solutions, requires convergence, a meeting of the minds and a consensus on how to proceed.