When you create dimensions in PerformancePoint Server you have an option to create a dimension from a csv file.
This sounds like a great way to kick start your dimensions because you can take a csv file with data and upload it to create a dimension and have it populated with some data.
Great idea, but only if you know the format of the csv file.
The first 2 rows are header records that must be there to define the dimension and hierarchy before you list the column headers.
See the screen shot below.