Throughout most of modern business history, corporations have attempted to unlock value by matching their structures to their strategies. As mass production took hold in the nineteenth century, for instance, companies generated enormous economies of scale by centralizing key functions like operations, sales, and finance. A few decades later, as firms diversified offerings and moved into new regions, a rival model emerged. Corporations such as General Motors and DuPont created business units structured around products and geographic markets. The smaller business units sacrificed some economies of scale but were more flexible and adaptable to local conditions.

A version of this article appeared in the March 2006 issue of Harvard Business Review.