Imagine someone planning strategy. What likely springs to mind is an image of orderly thinking: a senior manager, or a group of them, sitting in an office formulating courses of action that everyone else will implement on schedule. The keynote is reason—rational control, the systematic analysis of competitors and markets, of company strengths and weaknesses, the combination of these analyses producing clear, explicit, full-blown strategies.

A version of this article appeared in the July 1987 issue of Harvard Business Review.