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-   -   How do you rank? (http://www.chiefdelphi.com/forums/showthread.php?t=37297)

allen0977 14-04-2005 07:32

How do you rank?
 
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Team 1251, the TechTigers, have put together a "Relative Power Ranking" system that analyzes scores and records of teams competing at various regionals and ranks teams relative to each others performance. Come check out how your team ranks among other teams participating in your local regionals, across multiple regionals, and those attending nationals.

We pulled team names from each team's website, and tried to be as accurate and current as possible. Please let us know if your team goes by a different name so we can fix it in our database.

We could only compile data from the 19 regionals that contained data on the US FIRST website, if anyone has data from regionals that we are missing, it would be greatly appreciated.

http://1251.techtigers.com/PowerRank/FirstRPI

Thanks,
-Allen

Raul 14-04-2005 07:56

Re: How do you rank?
 
It looks like your power ranking is very close to being based on winning percentage. But since there are teams with higher percentages ranked lower, I am curious what formula that includes scores you used to figure the ranking.

allen0977 14-04-2005 08:01

Re: How do you rank?
 
Quote:

Originally Posted by Raul
It looks like your power ranking is very close to being based on winning percentage. But since there are teams with higher percentages ranked lower, I am curious what formula that includes scores you used to figure the ranking.

We determine a strength of schedule by looking at each teams opponents winning percentage and also those opponents opponents winning percentage ..

(3*(winningPercent) + 2*(OpponentsWinPercent)+1*(OpponentsOpponentsWinPe rcent))/6

that helps weight your score, and then we look at margin of victory in individual games to give more/less points which could move a team up/down the ranking. Everything changes with each new match entered, even if it is a team you never faced (as long as one of your opponents faced any team in the new match)

MattB703 14-04-2005 08:11

Re: How do you rank?
 
It seems like this ranking could be more accurate if it also included wins/losses in the elimination rounds.

NoRemorse 14-04-2005 08:21

Re: How do you rank?
 
That is a very neat system. I am very impressed! I wrote somthing very similar to fill out my bracket in March!

Gene F 14-04-2005 08:28

Re: How do you rank?
 
Quote:

Originally Posted by MattB703
It seems like this ranking could be more accurate if it also included wins/losses in the elimination rounds.

I was thinking the opposite. Our ranking does include the elimination rounds. Not including the eliminations would be a better random sampling.

SteveO 14-04-2005 08:40

Re: How do you rank?
 
Very Cool. That is an interesting formula.

Billfred 14-04-2005 08:40

Re: How do you rank?
 
I dig this.

I spotted a few quirks in the system--the FAQs and clicking the team number both try to trigger file downloads in Firefox 1.0.2. (Well, that, and 1293 is D5 Robotics--Ockham's Raizor is just the robot's name. But that's just splitting hairs.)

Hope to see this more in 2006!

thoughtful 14-04-2005 08:46

Re: How do you rank?
 
That is very accurate and i can see a lot of work went into it. Bravo!

However, i was thinking that no one mentioned counting your alliance partners strenght. This will make it much more accurate, for example if a team had low ranked alliance partners and still managed to win a lot of those matches; they should be rated higher. :rolleyes:

Warren Boudreau 14-04-2005 08:52

Re: How do you rank?
 
You can get more data from Karthik's white paper here: http://www.chiefdelphi.com/forums/pa...le&paperid=490

Swampdude 14-04-2005 08:53

Re: How do you rank?
 
You guys did a heck of a job on that software. Sebastian is the man when it comes to scouting and scouting software. They gave me a little demo at Palmetto and I was a bit overwhelmed.
On Saturday I was surprised you had us ranked so low, but when you based it on W/L's you're not necessarily going to get a good picture. Although it is definitely a good data point to look at. I would suggest you mix in a penalty factor though. In our case 2 of our losses at Palmetto were completely out of our hands because of penalties from our alliances. Maybe if you look at the score "before" penalties - since we actually won all 3 of of our losses but then penalties erased the scores. I know it's hard to actually get that information as to "who" drew the flags - or what the pre-penalty score was. But I think it will paint a better picture.
Anyhow, looking forward to seeing you guys next week!

Joshua May 14-04-2005 08:54

Re: How do you rank?
 
Looks nice, but some of the information seems to be wrong. For example, my team 1110 for some reason has the name "Circuit Runners" but that is team 1002.

gren737 14-04-2005 09:01

Re: How do you rank?
 
nice job :)

Jack Jones 14-04-2005 09:14

Re: How do you rank?
 
Quote:

Originally Posted by thoughtful
That is very accurate and i can see a lot of work went into it. Bravo!

However, i was thinking that no one mentioned counting your alliance partners strenght. This will make it much more accurate, for example if a team had low ranked alliance partners and still managed to win a lot of those matches; they should be rated higher. :rolleyes:

I agree 100%. It's often your partners that make you or break you.

David Guzman 14-04-2005 09:26

Re: How do you rank?
 
We have a great scouting team system in our team, this program that our scouts and Mr. B made is awsome.

At the regionals in the picking aliancer ceremony we could see how they were just picking the same teams that we had in our list and in almost the same order.

Also i think is pretty cool that you pick the regional(s) and it will give you a ranking with only the information from the chosen regionals, it takes a little bit because there is so much data involved but it works great.

Don't hesitate to visit our pits at The Championships or look for the bright orange shirts at the stands, you are all welcome to see the program and all the data that we have from every team.

Dave


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