Currently under construction, this page should link to the relevant posts that explain why I use the metrics I do, and how each one is useful.
What is TSR?
What is PDO?
The addition of a teams shooting percentage and save percentage, it exhibits strong regression towards the mean, even within a very short space of time within a season, and has essentially zero correlation to either how many points a team scores, nor how well it controls attacking possession, nor is it repeatable from season to season.
James' Blog 