Discussion: Rankings
in: Orienteering; General
Feb 5, 2006 2:03 PM
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I've just been looking at the NB yearly rankings, which got me thinking about what options are for creating rankings like that. Currently our system seems to be dividing competitors into age/gender categories and then calculating the average tpk for all the ranking events that the person completes. However, as far as I can tell, there are no consequences for either not starting or not finishing. Which means that the person who only ran the event that was in a city park is way ahead of the person who ran every event, some of which were in much slower terrain. I can totally understand why, for a simplicity point of view, and because we don't have very many competitors, a tpk system would be desirable, but I was wondering what other methods are out there. The person who has been calculating the rankings is retiring, so now would be a good time to look at this. Do people ever use point systems like they use at the Scottish 6 (and APOC 2002, I believe)?
Feb 6, 2006 11:40 PM
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sare:
I dont know if you rank everyone together or separately by category but this is what we do in Calgary:
We use the stats from the Scottish 6 day and get a Relative O Speed Factor for each category, ex.M21E = 1, F16 = 0.61. We then do some complicated equations that goes something like this: multiply your time by your factor, then calculate your TPK based on the length of the course that you ran and your calculated time.
Everyone that ran that day gets ranked by TPK all together then points get assigned based on how far you were behind the winner. ex.The winner gets 100pts, if you were double their Tpk you would get 50pts.
This way you get rewarded for each race and terrain speed doesnt matter. You can also say best 4 out of 6 races count so if you miss a race or screw up really badly you're still in the running.
I'm pretty sure this is how it works, we also do other calculations like your improvement factor over the season and others i don't really pay attention to or dont know what they mean. You can talk to Bill Jarvis, our Master Stat Calculator, to get more info.
Here's the Scotish6Day Relative O Speed Factors
And the rules
If you want to rank people in separate categories you do the same thing but separate them at the end. You can also separate people into categories before awarding points but it's not as accurate if you have a small category, ie. someone could have an awful race but still get 100 points because they were the only one in their category that day.
Hope this helps
We use the stats from the Scottish 6 day and get a Relative O Speed Factor for each category, ex.M21E = 1, F16 = 0.61. We then do some complicated equations that goes something like this: multiply your time by your factor, then calculate your TPK based on the length of the course that you ran and your calculated time.
Everyone that ran that day gets ranked by TPK all together then points get assigned based on how far you were behind the winner. ex.The winner gets 100pts, if you were double their Tpk you would get 50pts.
This way you get rewarded for each race and terrain speed doesnt matter. You can also say best 4 out of 6 races count so if you miss a race or screw up really badly you're still in the running.
I'm pretty sure this is how it works, we also do other calculations like your improvement factor over the season and others i don't really pay attention to or dont know what they mean. You can talk to Bill Jarvis, our Master Stat Calculator, to get more info.
Here's the Scotish6Day Relative O Speed Factors
And the rules
If you want to rank people in separate categories you do the same thing but separate them at the end. You can also separate people into categories before awarding points but it's not as accurate if you have a small category, ie. someone could have an awful race but still get 100 points because they were the only one in their category that day.
Hope this helps
This discussion thread is closed.