KPI, or Key Performance Indicator, is defined as "a quantifiable measure used to evaluate the success of an organization, employee, athlete, etc. in meeting objectives for performance". The first time I heard the term KPI was in a talk by Olympic track coach, Dan Pfaff. While track and field is an objective sport based on distance and time, soccer is often interpreted as a more subjective game. Sure, a striker's goal count can be easily tracked, but coaches may like the way one midfielder plays more than another and it is hard to quantify which player is indeed more effective. All of this is changing, as technology advances and becomes more integrated into world and youth soccer.