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questions about the Golfweek/Sagarin Performance Index.
rating system is based on a mathematical formula that uses a players won-lost-tied
record against other players when they play on the same course on the same day,
and the stroke differential between those players, then links all players to one
another based on common opponents. The ratings give an indication of who is playing
well over the past 52 weeks.
The following list is an explanation of each
category Sagarin uses to formulate his rankings.
- POWER RATING:
This is NOT a stroke average. The rating is calculated using a player?s record, stroke differential and connection to all the other players in the database. The difference between two ratings predicts the difference between two players in a typical round.
- SCHEDULE STRENGTH: The average strength of each event in which
the player has played, calculated using the power ratings of every player in every
- SCHEDULE RANK: The players schedule is ranked by difficulty
among the entire database.
- RECORDS: A players won-lost-tied
record, based on head-to-head competition, in each category. The winner in a 156-player
field has a record of 155-0-0, the runner-up is 154-1-0, etc.
- EVENTS PLAYED:
- MEN -- 10 needed to qualify on nine worldwide tours: PGA Tour, PGA European Tour, Nationwide Tour, Japan Golf Tour, Southern Africa Tour, PGA Tour of AustralAsia, Asian PGA Tour, European Challenge Tour and the Canadian Tour.
- WOMEN -- 10 needed to qualify on four worldwide tours: LPGA Tour, Ladies European Tour, Duramed FUTURES Tour and the Japan LPGA Tour.
- BOYS & GIRLS A player must have played in five events in the rolling 52-week window
(*-indicates player has not participated in the minimum number of events needed to be ranked).