Basically default value of a PerformancePoint filter is the default value of the relevant dimension. Following shows how to set default value of SSAS dimension. In my example I use dimTime dimension. I want to create a filter using dimTime dimension.
I’m going to use YearMonth member of dimTime dimension for the
filter. So I set default value of YearMonth as shown in above figure.
Set Default Value Dynamically
Moreover we can use MDX expression to set the default value
dynamically. Using that we can change the default value according to
Above MDX expression use to set the current month as default value in my scenario.
Now when I create PerformancePoint filter, this value becomes the default value.!!