We utilize an internal rating based upon current season results coupled with other league, state cup and tournament results when two league teams play each other. These ratings are used to establish groupings for the following season.
Some have asked for a general description on how they are established. At the start of each season each team is assigned an initial rating based upon its history. With first season teams this is often a best-guess. When any game is played, each involved team will get an adjusted rating based upon the results of that game. After a number of games for a team, its rating will be higher or lower than the initial rating based upon its results. After a team has 8 or so games during a season, its rating is pretty well established and one or two very strong or weak results would not alter their rating to a large degree.
An example of how a games outcome would change a team’s rating might help further. If team A with a rating of 3.7 and plays team B with a rating of 4.0, here are scenarios that indicate how the games results would affect their game component going into establishing a new rating.
#1: Game results in a tie – Team A earns 4.0 and team B earns 3.7; each earns their opponents rating.
#2: One team beats the other – The winning team earns the losing team’s rating plus 0.2 for the win plus a fraction of the goal differential. The losing team earns the winner’s rating minus 0.2 for losing minus a fraction of the goal differential. If the score of this game was A=2, B=4, then A earns 3.4 and B earns 4.3. If A=2, B=1, then A earns 4.4 and B earns 3.3.
Winning, draw or losing by a goal or two to those teams within your proximate level of ability will not affect your team’s rating by much. Do not be concerned by internal ratings. They serve one purpose only, and are not available to teams.