I don`t know about NBA, but Euroleague should use quite simple one, as they can say eff any time during the game... This would be really useful as we could see if our leaders really are the team leaders... The rating that we have now is kind a useless for me, course it shows skills not what he done in game... This could even be visible during life games in statistics... And yes it something like eff = Points - missed shots + total Rebounds + Steals + Blocks + Assist - turnover...
ZyZla - ZyZlūnas ZyZlavotas ~c(=