from my experience, this is the best way to do it if you have a hydraulic cam- with it idling and up to temp, back each nut off until it clatters, then just snug it down enough to make it stop. do that on all 16, then shut it down (i do them one side at a time to avoid making too big of a mess). after you get them all done, shut it down and give them all a half turn down and call it good.
that's the way my Grandpa taught me to do it, and i've never had to readjust valves. of course, this doesn't apply to engines that are being assembled or put back together or solid cams, and poly locks on hydraulic cams can be a pain to do this way unless you have them neat vavle adjusting tools.
you don't plan sincerity.
you have to make it up on the spot.
wanna hear about 20 years ago when i was too smart to know any better?