LaxMath presents the rating of high school and college lacrosse teams using two methods.
They are: (1)
power ratings (PR) which is based not on wins or losses but rather the
goal margin of victory when two teams play each other. (2)
Ratings Percentage Index (RPI) which is
based on win-loss records and not game scores and is employed by the NCAA for college lacrosse.
There are also two derived quantities that measure a teams strength and they are (3)
Strength of Schedule (SOS) and (4)
Quality Wins Factor (QWF) where the former represents the
degree of difficulty of a team's schedule and the latter represents wins and losses weighted by the
strength of opponents. SOS and QWF results differ depending on which method: PR or RPI is used.
There are two additional quantities which signify a team's strength and that is (5)
tournament selection,
which is the order (seed) in which a team would be selected for the post season championship tournament and
(6)
championship probability which predicts the chances of a team winning the college division
championship or high school state championship The former is based on the RPI, SOS and QWF ranking and
the latter on a modified power rating method.
All information and data presented throughout these pages focuses on these six quantities.
Click here for visual overview`