In my coaching, I usually work with executive clients for eighteen months. I warn each client that the process will take longer than they expect because there will be a crisis. I can’t name the crisis, but it will be legitimate and real—for example, an acquisition, a defection, a major product recall—and it may dramatically extend the time they need to achieve positive change. They cannot predict it, but they should expect it—and it will distract them and slow them down.