Winning is part of the equation, but can't be all of it. Some schools, for various reason, will have more difficult time winning than others, regardless of how well a team is coached. Other factors are important: class, organization, discipline, hard work, character, effort of players, strategy and adjustments. Sometimes the best coaches don't win for a variety of reasons (lack of talent, no support, etc.). Sometimes poor coaches win because of an abundance of talent. It's easier to judge college coaches in any sport because they are responsible for getting their own talent. In high school, sometimes coaches have to play the hand they've been dealt. At one schoo, for example, 17 wins might be a poor season where at another school 17 wins would be a great coaching job.