What does the Crucible Combat Rating mean?

Alright so I was just looking at my crucible stats on B.net and saw the Crucible Combat Rating. This is obviously based on your performance, but does anyone know how this is calculated, what a good/bad rating is, and how Bungie uses it? I'd like to believe it's something like their matchmaking algorithm they had in place for Halo to keep players fairly matched, but I've been in too many lopsided matches in Destiny for that to make any sense. If anyone has any insight into this stat please share.