What It Is
Tendex is one of the oldest box score composite metrics in basketball, developed by Dave Heeren in the 1950s. It divides a raw box score sum (points + rebounds + assists + steals + blocks − turnovers − missed shots) by minutes played.
APEX Rationale
Not used in APEX. Tendex is primarily of historical interest as one of the first quantitative player evaluation attempts. NBA Efficiency, FIC, PER, and Game Score are all more developed variants of the same basic approach. All are superseded by BPM and RAPM-family metrics for serious analytical purposes.