2008 PHRF NATIONAL CHAMPIONSHIP
Scoring Criteria
Updated - January 18,
2008 (Final Rating Band Adjustment)
ELIGIBILITY
Entrant must meet the eligibility criteria for PHRF racing and win
their respective PHRF class at Acura Key West 2008
CHAMPIONSHIP SCORING OVERVIEW
The winner will have the highest point total calculated using the
following scoring factors:
|
Scoring Factors
1. Fleet Performance
using average corrected speed
(adjusted for boat
size / rating bands) |
Max Points
10.0 |
|
2. Class
Competitiveness measuring relative competitiveness
of classes using time between 1st and 5th place finishers and
the number of boats in class and boats beaten |
10.0 |
| |
|
|
Maximum Total:
|
20.0 |
1. Fleet Performance
(10 points possible): The class winners will be compared to each
other and assigned points based on the boat’s adjusted Average
Corrected Speed for the week (ACS). The ACS will be calculated after
discarding the 2 races with the best and worst corrected speeds.
The ACS will then be adjusted based on the rating band each boat
falls in. (Reason for the adjustment: PHRF handicaps are assigned
and have been refined over time in part based on how the boat
performs against similar sized boats (boats they would routinely
compete against). Rarely does a Farr 36 race against a J/24, hence
those relative handicaps have not been considered. Studies of Key
West PHRF racing, accessing average corrected boat speed for the
series, have shown quite clearly that the smaller boats in fleet
have a less competitive handicap than larger boats when they are
rated together.
2. Class Competitiveness (10 points possible): The class
winners will be compared to one another and assigned points based on
how competitive the racing was in the respective PHRF classes. This
will be determined by accounting for two factors;
a) The average corrected
time between the 1st and 5th place finishers discarding the 2 races
with the least and most time between 1st and 5th (7 points);
b) The size of the class and number of boats the class winner beat
during the
series (3 points)
SCORING FORMULAS
1. Fleet Performance (10 points possible)
Average Corrected Speed for the Week (ACS):
Corrected Speed for a Race (CSR) = Distance Sailed / Corrected Time
(in hours)
ACS for the week = (CSR – Best CSR – Worse CSR) / (# of Races Sailed
by Class – 2)
Rating Band Adjustment to ACS: (POSTED JAN 18, 2008)
|
-50 to -75
0 to -50
0 to 50 (sport)
0 to 50
50 to 90
50 to 100+ (sport)
90 to 120
120 to 150
150+ |
0.94
0.97
1.00
1.00
1.00
1.00
1.00
1.03
1.05 |
Points Allocated for Fleet Performance Ranking:
1st
10.0
2nd 9.6
3rd 9.3
4th 9.1
5th 9.0
6th
8.9
2. Class
Competitiveness (10 points possible)
Time Between 1st and 5th (7 points):
Average Corrected Time Between 1st & 5th = (corrected time in
seconds between 1st and 5th place each race – Least Time – Greatest
Time) / (# of Races Sailed by Class – 2)
Points Allocated for Class Corrected Time Ranking:
1st 7.0
2nd 6.8
3rd 6.6
4th 6.4
5th 6.3
6th 6.2
Class Size and Number of
Boats Beaten (3 points)
Based on the total number of competitors beaten during the course of
the week
Class size factor = 3.0 (largest class), 2.9 (next largest class),
and -0.1 for each smaller class
Class Size Performance Factor =
Class size factor x (total number of boats beaten) / (number of
boats possible to beat)
2007 CHAMPIONSHIP RESULTS |
