Nothing good comes of having the wrong CEO. Mentoring, coaching, senior team members with complementary skills, and special help from the board can’t compensate. The misses are devastating—and very public. Yet some boards still pick chief executives who aren’t right for the job—repeatedly. The revolving doors at HP before Meg Whitman, at Apple before Steve Jobs’s second tenure, and at Yahoo during the past decade are only a few of many recent examples!