This is an initial attempt to measuse and compare power between characters (and parties). Although a very difficult task in Hero System, it might help GMs to design balanced encounters. It is more or less related to the idea behind Dungeons & Dragons' Challenge Rating.
Notice that a key aspect in the spreadsheet is the "fitting factor"; using a few combats as a reference, it seems to be it should be somewhere between 1,5 and 5.
As a guideline, encounters where the odds are over 70%-30% should be considered easy ones.