A well-regarded CEO approaches retirement age. He knows it is only responsible to designate a successor, and the board agrees wholeheartedly. Together, they screen internal candidates but decide that none possesses all the skills necessary to propel the company forward. Soon, a bright star is hired from outside the company—with the assurance that if he performs well, he will ascend to the top spot in two or three years.

A version of this article appeared in the November–December 1999 issue of Harvard Business Review.