The Tendex system is a basketball mathematical statistical formula that was created by sports writer Dave Heeren,[1] in order to determine the playing efficiency of basketball players.
[2][3][4] It is generally accepted as the original weighted advanced stat formula used in the sport of basketball.
[5] The Tendex statistical system has 3 different formulas and is calculated as follows:[6][7] Standard Tendex Rating: (Tendex raw statistical formula)
Modified Tendex Rating: (Tendex weighted average statistical formula)
European Tendex Rating (Performance Index Rating (PIR)): (EuroLeague / EuroCup)