Yes, your missions are all different. But I'm not asking you to
compare yourself to other charities. I like the way Dave put it above:

"How do you judge and measure your effectiveness? Is is purely
subjective, or is there a more analytical method of figuring out that
your disaster relief programs were more effective or more efficient
this year than last year?"

I don't know enough about the Red Cross to really know the best way to
understand how effective you are. But I assume you know if you are
effective. So how do you know that? The answer might not be
statistical, but there must be some way that you know that it makes
more sense for me as a donor to fund you than to cut a check to FEMA.