Using DAX to compare data or metrics over time is incredibly efficient. Using a range of techniques in this post I'll show you how to analysis performance of these metrics over multi-year time periods.
One type of analysis I like to use quite often is comparing this year totals to last year totals. I want to also always make it as dynamic as possible. All I should have to do is change the context of my calculation (ie. bring in a new dimension like regions/products etc) and everything should automatically re-calculate.