After analyzing data from more than 15,000 interviews with CEOs and other business leaders, executives from management consulting company ghSMART found that three fundamental factors drive leadership success. In their book, Power Score: Your Formula for Leadership Success , Geoff Smart, Randy Street and Alan Foster describe what they learned. In this interview with Knowledge at Wharton, co-authors Street and Foster talk about the formula for management success, the hardest things for executives to get right and how teams can use the PWR formula within their own organizations. An edited transcript of the conversation appears below. Knowledge at Wharton: Randy, you describe PWR Score as a “grand unified theory” of leadership, boiled down to a single number. What exactly does that mean? Randy Street: We’ve been on a journey for the last 20 years, as a firm and as individuals, thinking about leadership.…