Well now,I use temp as a timing mechanism on big hunks of meat.
180º-200º won't overcook much a nothin',so it can hang there as long as you want.
If we were going out for the evening,and I didn't want to mess with a bunch of meat at midnight,I might load at 7 PM at 180º.
If I am wanting to smoke more,I may also cook there for several hours.
Depending on my schedule the next day,I might kick it up at midnight,or I might wait until when I awaken in the morning.
Folks that have tried to make me a cook,like to let briskets/butts stay in the plateau as long as possible.[160º-170º typically]
This is where we are really rendering the fat and breaking down collagen,without drying out the meat.
225º is generally felt to be a good temp for this.
Now, cooks I respect have taught me that cookers have a temp they like to run and do well at,and not to fight it-because I read something in a magazine.
I like to know the actual ave temp at the meat level,but the setting doesn't really concern me.
I like to cook many things at 220º-240º.
If I'm behind in the cook,250º will help push through the plateau.
If I'm through the plateau and need to finish for dinner ,275º can work.
If I'm really behind,that is where foil and temp can speed up the cook-Not improve it.
At home,weekend type cooks,I like to get briskets/butts out and into the cooler about noon.
They'll hold fine until dinner time.
Then I cook my ribs.
Should leave me time to finish them,and still do some chicken-if that's on the schedule.
I usually toss in some assorted sausages,near the end of the ribs,for snacks-if I run behind.
Well now,my teammates are more into catering and would have better answers about holding and reheating.
Yes, precooked from a commissary,vacpac,and boil in the bag are used well by some restaurants.
Yes,there are some restaurants,with good cooks,cookers,experience,and attention to detail that can pull good meat straight from the pits to serve without foil.
Yes, a lot is cooked,chilled,and reheated as needed to serve.
Reheating can be done with commercial microwaves.
Half foil pans,usually hunks of meat,a little broth/coffee,covered with plastic and then foil.
Heated at less than 250º,to over 140º,pull and serve as needed.
Once you move away from the brisket belt,and even there,chuck rolls,or clods may be used for sliced-or especially chopped/pulled beef.
They cook easier and hold much better.
This brisket stuff is all just one man's opinion,and one brisket at a time.
Your notes and practice will be better guides.
Now,I'll get outa here before someone accuses me of makin' a Smokin'Okie post.