Player Impact Plus Minus (PIPM) is a new kind of adjusted plus-minus metric that incorporates boxscore data “luck-adjusted” plus-minus data. The output of PIPM is an estimate a player’s value over the course of a season.
Luck-adjusted methodology is created by Nathan Walker and uses more statistically predictive factors of a team’s offensive and defensive rating (points scored or allowed per 100 possessions) to estimate what the team’s offensive and defensive efficiency should be without the variance of some stats.