PvE Power is a statistical model developed by Wowtrack. Based on the past performance of players, it predicts the expected performance of guilds in the upcoming raid content. PvE Power is expressed as a value between 0 and 1,000. The value is roughly proportional to the order of magnitude of the expected rank of a guild.
We have just published our forecast for the Patch 7.0: Legion race. You can browse both the global ranking forecast, and our per-realm forecasts.
The PvE Power model uses methods of statistical learning and modelling, and has shown good performance in back testing on historic data. But of course, past performance is no guarantee for future precision, and time will be the ultimate judge.
Enjoy the Legion race!