THE
2008
The system is based on the IAAF ranking system, see the rankings page on www.iaaf.org. The total score has three components:
Performance Score, see below
Placing Score, 1st place 25% of Performance
Score; 2nd 20%; 3rd 16%, etc.
Participation Score, 10 points for completing
an event.
The formulas used to calculate Performance Score are:
Races: Points = d*(a*(b-M)^c)
Field
Events: Points = d*(a*(M-b)^c)
Where M is the actual performance in seconds or
metres, and a, b and c are constants for each event calculated by the IAAF
statisticians, see www/icosathlon.net, "rules of competition" and world-masters-athletics.org. Some of our JD events are not IAAF events, 80
metre hurdles, 300 metre hurdles, 800 metre race-walk, 1500 metre race-walk and
1500 metre steeple chase. For these
events, we've interpolated values using the events nearest to as our guide.
For Youth 15 Boys we use the IAAF women's constants. For the Junior Development ages and Youth 15
Girls, the "a" and "b" constants are revised to reflect the
lower performances range.
Explanation of IAAF constants;
"a" equalizes the event performances, e.g. high jump
(X.xx) has a high number (916.325) and the 3,000 metres (XXX.xx) a low number
(.00683). These constants were set in
1985 with the then world records scoring 1200 points.
"b" is the performance so far below standard that it is
deemed to score zero points.
"c" controls the shape of the curve from the
"b" point through the 1200 score.
Constant "d" is set so that Standard
Performance, see below, will score 72 points.
Why 72? So that a perfect performance will score 100:
Performance
at Standard = 72
Participation = 10
Total =100
Standard Performance is all time #1 on the JD Top Ten
Lists or BC Records for the Juveniles and Juniors.