The biggest difference between being a great functional manager and being a great general manager—and particularly a great CEO—is that as a general manager, you must hire and manage people who are far more competent at their jobs than you would be at their jobs. In fact, often you will have to hire and manage people to do jobs that you have never done. How many CEOs have been head of HR, Engineering, Sales, Marketing, Finance and Legal? Probably none.
So, with no experience, how do you hire someone good?