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Methodology

Methodology

How Selection Room builds composite rankings and projected CFP fields.

Selection Room models committee-style selection from transparent inputs: resume metrics, predictive ratings, strength of schedule, and configurable weights.

Composite pipeline

Each team receives normalized sub-scores, and a weighted composite drives field selection and bracket seeding. The four weight components:

ComponentWhat it measures
ResumeWhat a team earned on the field: wins, losses, and quality results
PredictiveUnderlying team strength from predictive ratings, regardless of record
SORStrength of record: how impressive the record is given the schedule actually played
SOSStrength of schedule: how hard the slate was, independent of results

Defaults are recorded in every run's metadata and are adjustable in Scenario Lab. Formulas and metric definitions live in the research docs on GitHub.

How selection works (5+7)

The 12-team field follows the published CFP format:

  • Automatic bids (5): the five highest-ranked conference champions qualify automatically.
  • At-large bids (7): remaining spots go to the highest-ranked teams not already selected.
  • Displacement: if an automatic qualifier ranks outside the top 12, it still gets in, and the lowest-ranked at-large team is displaced. Every displacement is recorded in the run's audit trail.

Seeding rulesets

Two eras of seeding rules apply, and every run records which one it used:

RulesetSeedingByes
2024Top 4 conference champions take seeds 1-4Champion byes
2025+Straight by final rankingTop 4 overall

First-round pairings: 5 vs 12, 6 vs 11, 7 vs 10, 8 vs 9. Always check a run's ruleset before comparing seeding across seasons.

Key concepts

ConceptSummary
CompositeWeighted blend of resume and predictive inputs
Selection StabilityWeight perturbation sensitivity (not game simulation)
Sample dataFixed ~20-team universe for offline runs
Live CFBDFull FBS universe from CollegeFootballData.com

Important

Scores are min-max normalized within each run universe. Sample data and Live CFBD runs are not directly comparable across modes.

In-app reference

The live Methodology page shows the active run's weights and mirrors the metric definitions used in rankings tables and tooltips.