Depending on what you're reporting on, in Performance Analytics you'd just need to pick (for Scorecards) or set (for Dashboard widgets) the time series you want to apply - for example if you pick By Year Sum+, then it'll give you the summed scores for that indicator for the previous years, as well as this partial year.
There are a couple of challenges with the Time Series aggregations though, so you'll want to think about it logically. I.e. you can't pick an Avg + if it's already a calculated average, or it won't be weighted properly, since it's averaging the scores. Likewise, because it's performing arithmetic against the scores tables, you wouldn't be able to do a time series on an "Open" indicator, because if a ticket is open for multiple days, it will be counted on each day, and then those days added together.
