gatorman001,
Good question. Without going into too much detail (I don't want to give away all my secrets), each game has a Game Value and a Significance Factor based on the strength of each team.
For example:
Team A has a power ranking of 100. Team B has a power ranking of 90. This means Team A should be expected to win by 10 pts.
Game Value: This is the baseline value of the game. In this case, we have a value of 100+90/2 or 95.
Significance Factor:
The factor applied to the final score. This is calculated using the difference between the two teams.
Team B =90/Team A= 100. Therefore, the Significance Factor of this game will be 90% of the final score.
Let's say, the game is played and Team B wins in an upset by 3 pts.
To calculate each team's performance:
1) Team B won by 3 points
2) 3 pts * 90% (Game Significance Factor) = 2.7 which becomes the final score.
3) 2.7 divided by 2 = +1.35 for Team B and -1.35 for Team A
4) We add the 1.35 to 95 (Game Value) for Team B and we subtract the 1.35 from 95 for Team A.
Therefore, Team B's ranking for the game was 96.35 and Team A's ranking for the game was 93.65.
There's much more to it but this is the premise for the Power Ranking Process.