perhaps, "precision" is a better term
for me "perfect" is venus de milo, mona lisa, 'wish you were here', a girl i saw down the street, the kangaroo-carotte stew i made last week, citizen kane, annie hall, marina tsvetaeva's poems etc etc
i try to to have a "perfect" moment at least once a day (once a week is more like it works out)
it brings me back to this conductor's quote, whose name i don't recall, sadly:
"there are an infinite number of versions of the piece, but there is only one definitive performance on the night"
when you get it "right", it's perfect, and everything clicks into place
you couldn't add or subtract anything to this moment, it's "perfect" as it is
imo, precision takes away from perfection by reducing the emotional impact of "seeing" the human inside the work, which is the reason any of us actually enjoy art, other than for esoteric purposes
machines are precise, but, certainly, not perfect, in any sense of the word
perfection is in the eye of the beholder, unlike precision, which can be measured and reproduced