PT-PM was an early attempt to use NBA player tracking data (player position, movement, speed) as inputs to a plus-minus estimator. It was developed and published publicly for a period before being discontinued.
Represented an early effort to incorporate tracking data — the type of off-ball positioning and movement data that box score metrics cannot capture — into an impact estimator.
No longer updated or maintained. Historical data has limited coverage. Modern tracking-informed metrics (RAPTOR was the most prominent, now defunct; proprietary team models) have superseded this approach.
Not used in APEX. PT-PM is defunct. The tracking-data-informed estimator problem it was trying to solve remains relevant (Byman 2023 confirms tracking features are the top RAPM predictors), but the public implementation no longer exists. Finding a maintained tracking-informed successor to RAPTOR is an explicit V2 Roadmap Tier 1 priority.