TPI = 40% Win Rate + 30% Offense + 30% Defense
Win rate counts draws as half a win. Offense is goals-per-game normalized to 100 (4 gpg = max). Defense inverts goals-against-per-game (0 gapg = 100).
The Team Performance Index (TPI) is a composite metric that provides a single-number summary of how well a team is performing across multiple dimensions. Rather than looking at wins alone, TPI combines win rate, offensive output, and defensive solidity into one balanced score out of 100.
This approach is used by sports analysts and coaches to compare teams more fairly than simple league standings. A team with a moderate win record but exceptional defense might score similarly to a team that wins more but concedes heavily, reflecting the different strengths each team brings.
The win rate component (40% weight) measures overall results, counting draws as half a win. This is the largest factor because ultimately, winning is the primary objective in competitive sports. A team with 15 wins, 5 draws, and 10 losses would have a win rate of 58.3%.
The offense score (30% weight) normalizes goals or points scored per game against a benchmark of 4 per game. The defense score (30% weight) inverts goals conceded, rewarding teams that keep clean sheets and limit opposition scoring. Together, these capture whether a team dominates at both ends of the field.
To improve your team's TPI, focus on converting draws into wins, as this directly boosts the win rate component. Analyze close games to identify patterns -- late goals conceded, missed opportunities, or tactical adjustments that could swing results. Even converting two draws into wins can significantly impact the overall index.
Defensively, reducing goals against per game has a compounding effect -- it both improves the defense score and often converts losses into draws or wins. Set-piece defense, pressing patterns, and goalkeeper coaching are high-leverage areas that many teams overlook when seeking improvement.
The TPI framework works across any sport with win/loss/draw records and scoring data. In football (soccer), where draws are common and scores are low, the defense component often differentiates top teams. In basketball, where draws are rare and scoring is high, the offense and win rate components tend to dominate.
When comparing TPI across sports, remember that the normalization uses 4 goals/points per game as the benchmark. For high-scoring sports like basketball, you may want to adjust the "Goals For" and "Goals Against" to a per-quarter or relative scale for more meaningful differentiation between teams.