According to a question asked here on meta, the commitment percentage of an Area 51 proposal is based on the "score" each committer has:
We give each user a "score" based on how likely we think they are to contribute to the site
Here's the formula we have right now. It's almost certainly wrong and we'll be tweaking it as we go:
UserScore = SUM(Reputation >= 200 ? 0.233 * ln(Reputation-101) - 0.75 : 0) + 1
Since the formula is really complicated, it's probably calculated asynchronously every day and stored somewhere. Why not show that value somewhere, so each user knows how much they'll contribute to a proposal when they commit to it?
I don't care if it's publicly displayed of if only the user himself can know it (on the user page, for example), that's not the matter here. What do you think?