Four Factors
by Ken Pomeroy on Monday, August 1, 2005
The offensive and defensive summary pages are based on Dean Oliver’s four factors concept. You can read Dean’s more detailed explanation of the four factors here. Essentially, the four factors are the building blocks to the efficiency formula.
Efficiency data gives you an idea of the quality of a team’s offense or defense, but the four factors tell you why a team is good or bad when they have or don’t have the ball. Here’s a breakdown of how each statistic on this page is calculated…
Effective field goal percentage is like regular field goal percentage except that it gives 50% more credit for made three-pointers.
eFG% = (.5*3FGM + FGM) / FGA
Turnover percentage is a pace-independent measure of ball security.
TO% = TO / Possessions
Offensive rebounding percentage is a measure of the possible rebounds that are gathered by the offense.
OR% = OR / (OR…