We evaluate how Jewish a person is based on three factors. How Jewish they are internally, how Jewish they are externally and how much we want that person to be a Jew in the first place.
In practice, the I Score tends to refer to birth history with some adjustments for how we imagine they see/saw themselves. The O Score is for how Jewish they look and act. The K Score stands for Kvell (pride) and is subject to the whims of the creators of this website. Each score ranges from 0 to 5.
The Jew Score refers to our opinion only and is affected by, but not definitive, of one's actual Jewishness.