Evan Daum, Canada West Communications
- The Saskatchewan Huskies (women’s) and Calgary Dinos (men’s) lead the first basketball ratings performance index (RPI) rankings of 2017-18
- RPI is used by Canada West for playoff seeding purposes in basketball
- First used in 2016-17, the CW RPI formula was revised for the 2017-18 season
EDMONTON – With the 2017-18 Canada West basketball season set for the December break, the conference unveiled the initial ratings performance index (RPI) rankings on Monday.
Now in its second season, the CW RPI is used to seed playoff teams, while win/loss record is again being used to determine playoff qualification (top 12 teams qualify). The CW RPI was implemented last season to account for varying strengths of schedules, resulting from the conference's unbalanced schedule.
After one season utilizing RPI, the formula used to calculate the rankings was tweaked during the off-season following review by Canada West's sport committee. The new formula, listed below, increased the value of a team's win/loss record, while reducing the value assigned for away wins and increasing the value for home wins.
2017-18 RPI formula
The formula used in 2016-17 was as follows:
RPI = 25% team winning percentage (WP) x 1.2 away win + 0.8 home win, 50% opponents' average winning percentage (OWP), and 25% opponents' opponent's average winning percentage (OOWP).
The formula being used in 2017-18, with changes from last season in bold, is as follows:
RPI = 35% team winning percentage (WP) x 1.1 away win + 0.9 home win, 40% opponents' average winning percentage (OWP), and 25% opponents' opponent's average winning percentage (OOWP).
Early RPI leaders
Leading the early RPI races are the Saskatchewan Huskies (women’s) and Calgary Dinos (men’s).
The Huskies – the defending CW champions – are 9-1 through 10 conference games, with their only loss coming to Calgary, who sit fifth in RPI.
On the men’s side, Calgary sits 9-1 at the December break, with their only loss being a five-point setback to the Brandon Bobcats in mid-November.
In terms of differences between the RPI and the conference standings, the Alberta Pandas see the biggest jump up in the women’s RPI compared to their place in the standings.
Alberta sits seventh in the RPI, while they are 10th in the CW standings with a 5-5 record.
For the men, it’s the Regina Cougars who benefit the most from RPI, as they’re four places higher in the rankings – second – compared to their sixth-place spot in the conference standings. The Cougars’ signature wins this season came in a sweep of the Lethbridge Pronghorns, who at 10-2 are tied for first in the conference standings with the UBC Thunderbirds.
CW women’s basketball RPI (as of Dec. 4)
- Saskatchewan - 0.7042
- Regina - 0.6541
- Trinity Western - 0.6031
- Lethbridge - 0.6022
- Calgary - 0.6010
- Victoria - 0.5519
- Alberta - 0.5379
- Winnipeg - 0.5136
- Thompson Rivers - 0.4966
- UNBC - 0.4725
- UBC - 0.4709
- Manitoba - 0.4555
- Brandon - 0.4476
- MacEwan - 0.4369
- UFV - 0.4009
- Mount Royal - 0.2996
- UBC Okanagan - 0.2717
CW men’s basketball RPI (as of Dec. 4)
- Calgary - 0.6691
- Regina - 0.6364
- Lethbridge - 0.6352
- UBC - 0.6202
- Brandon - 0.5980
- Alberta - 0.5608
- Manitoba - 0.5433
- Victoria - 0.4990
- Mount Royal - 0.4877
- UFV - 0.4624
- UNBC - 0.4376
- Winnipeg - 0.4342
- Saskatchewan - 0.4252
- Thompson Rivers - 0.4138
- UBC Okanagan - 0.3754
- MacEwan - 0.3685
- Trinity Western - 0.3404