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I am building a ranking system. To get a rank of an item, I have considered using ratio and method.

Let's say I have an item with 10 wins and 10 losses.

Ratio: 10/20 = 0.5 Point: 10 - 10 = 0

What other options do I have?

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    Have you looked at Wikipedia entry on [Ranking](http://en.wikipedia.org/wiki/Ranking#Strategies_for_assigning_rankings)?2012-01-21

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The ranking problem comes up in many contexts. People who want to rank American college football teams have come up with the BCS system. Part of this involves asking experts for their opinions, but part of it is purely mathematical. Start with the wikipedia page.

Chess players also get ranked, by the Elo system. Here's a wikipedia link.

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    +1 $f$or Elo (Its a great rating system) although it debatable whether it is applicable to the situation at hand. It is mainly used as an indicator $f$or playing strength and thus may not be suitable to rank comments (in some version it takes into account how long ago you played).2012-01-22