RPICH (Rating Percentage Index for College Hockey) is my implementation of the Rating Percentage Index (RPI) method that has been used the NCAA committees in hockey, basketball, and baseball. RPI ratings have been used by Division 1 Ice Hockey Committee as a tool for selecting and seeding the teams for the national tournament. While RPICH is not and has not been supplied to the Committee, it should be identical to the official ratings. The method isn't a secret; it has been well-documented in the press and here on HOCKEY-L. Start with the results of non-exhibition games between the 44 schools eligible for the Div1 tournament (they each play at least 20 games against Div1 opponents). Calculate the Winning Percentage (WP) of each team ((wins*2 + ties) / games*2). Now, for each team calculate the Opponents' Winning Percentage (OWP) by summing the WP of the opponent in each game (exclusive of games against that team) and dividing by the number of games. Calculate the Opponents' Opponents' Winning Percentage (OOWP) for each team by summing the OWP of the opponent in each game and dividing by the number of games. Finally, RPICH = (WP*.25) + (OWP*.5) + (OOWP*.25). Now, the disclaimer: RPICH IS BASED ON SCORES COMPILED AND CALCULATIONS PERFORMED INDEPENDENT OF THE NCAA AND ANY AGENTS THEREOF. If you have any questions, please send them to me ([log in to unmask]) and I'll try to address them all. In the meantime, here's the first RPICH of the season. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Rating Percentage Index for College Hockey, compiled by Erik Biever This report includes the 291 games through 12/11/94 between teams eligible for the Division 1 tournament. Opp OppOpp G W L T Win% Win% Win% RPICH 1 Maine 17 12- 0- 5 .8529 .5482 .5389 .6221 2 Colorado College 16 13- 3- 0 .8125 .5456 .5135 .6043 3 Boston University 15 9- 3- 3 .7000 .5988 .4912 .5972 4 Denver 16 11- 5- 0 .6875 .5499 .5233 .5776 5 Minnesota 14 9- 4- 1 .6786 .5456 .5192 .5722 6 Brown 8 6- 2- 0 .7500 .5069 .5096 .5684 7 Michigan 15 11- 4- 0 .7333 .5152 .4965 .5651 8 Michigan State 16 11- 4- 1 .7188 .5231 .4940 .5648 9 New Hampshire 15 10- 3- 2 .7333 .4801 .5219 .5538 10 Harvard 11 5- 5- 1 .5000 .5939 .4922 .5450 11 Northeastern 16 8- 5- 3 .5938 .4954 .5475 .5330 12 Clarkson 11 6- 3- 2 .6364 .4972 .4913 .5305 13 Bowling Green 15 10- 5- 0 .6667 .4724 .4897 .5253 14 RPI 10 6- 4- 0 .6000 .4961 .5023 .5236 15 North Dakota 16 7- 8- 1 .4688 .5500 .5118 .5201 16 Wisconsin 17 8- 8- 1 .5000 .5244 .5163 .5163 17 Michigan Tech 16 7- 7- 2 .5000 .5236 .5057 .5132 18 Dartmouth 7 3- 3- 1 .5000 .5218 .5065 .5125 19 St Cloud 16 8- 8- 0 .5000 .4999 .5074 .5018 20 Vermont 12 7- 5- 0 .5833 .4607 .5005 .5013 21 Western Michigan 15 8- 6- 1 .5667 .4695 .4939 .4999 22 Providence 14 5- 6- 3 .4643 .5266 .4760 .4983 23 Princeton 11 5- 5- 1 .5000 .4875 .5102 .4963 24 Yale 8 3- 4- 1 .4375 .5060 .5083 .4894 25 Boston College 15 4- 9- 2 .3333 .5681 .4822 .4879 26 Northern Michigan 16 7- 9- 0 .4375 .4993 .5031 .4848 27 Illinois-Chicago 15 6- 6- 3 .5000 .4602 .4859 .4766 28 Cornell 6 1- 3- 2 .3333 .5299 .5128 .4765 29 Merrimack 13 3- 7- 3 .3462 .5282 .4804 .4707 30 Mass Lowell 16 7- 6- 3 .5313 .4089 .5145 .4659 31 Colgate 11 5- 5- 1 .5000 .4320 .4956 .4649 32 Lake Superior 14 5- 6- 3 .4643 .4488 .4944 .4641 33 Miami 16 7- 8- 1 .4688 .4433 .4951 .4626 34 St Lawrence 11 3- 7- 1 .3182 .5235 .4725 .4594 35 Union 9 3- 4- 2 .4444 .4376 .4973 .4542 36 Ferris State 14 5- 7- 2 .4286 .4460 .4839 .4511 37 Alaska-Fairbanks 14 3-10- 1 .2500 .5251 .4856 .4465 38 Air Force 8 2- 5- 1 .3125 .5034 .4595 .4447 39 Alaska-Anchorage 16 5-11- 0 .3125 .4662 .5201 .4413 40 Minnesota-Duluth 17 4-11- 2 .2941 .4676 .5096 .4348 41 Ohio State 13 1-10- 2 .1538 .5517 .4778 .4338 42 Army 5 1- 4- 0 .2000 .4401 .4921 .3931 43 Notre Dame 14 1-12- 1 .1071 .4902 .4745 .3905 44 Mass Amherst 12 0-11- 1 .0417 .4036 .5095 .3396 RPICH is calculated by the Rating Percentage Index method, used as a tool in selecting teams for the national collegiate tournaments in basketball, baseball, and hockey. Ratings are derived by summing each team's winning percentage, the average winning percentage of its opponents, and the average winning percentage of its opponents' opponents, multiplied by 25%, 50%, and 25% respectively. Factors such as home ice and margin of victory are not included. No individual game is weighted more heavily than any other. Copyright 1994 Erik Biever. RPICH is freely available for personal use; if you want to publish it somewhere else, you need my permission.