Feature to Noise ratio

Someone asks what FS means on cocoon-dev (and no it's not Full of Something).

Googling for a good definition I find this one which I like: "Each feature brings in a penalty of a possible compromise in signal quality".

So, let's improve the signal-to-noise ratio of our software...

update: I stand corrected, in Cocoonspeak the official meaning of FS is flexibility syndrome, not Feature Syndrome as I thought.