Rankings can seem to be unstable if the absolute differences between the scores are very small relative to the likely ways those scores could change. Example:

Rankings can seem to be unstable if the absolute differences between the scores are very small relative to the likely ways those scores could change. Example: Rank,Score 1,0.81 2,0.541 3,0.540 .. 40,0.538 Increasing the value of row 40 by just 1% will cause it to go from rank 40 to rank 2. Edit: Improved formatting.