I brewed a batch of stout on Sat., with a 13.5# grain bill. Here is the time schedule I ended up with:
30 minutes heat mash water - 4.5 gal. (crush malt at this time)
10 minutes stir in water, thoroughly
30 minutes rest - 126*
30 minutes raise to mash temp - 156*
60 minutes rest as mash temp (checked at 30 min)
heating sparge water during mash rest - 5 gal.
30 minutes raise to mash out temp - 168*
90 minutes sparge (should have been less - snafu - 1 pint per minute draw off instead of 1 quart per minute)
120 minute boil - needed this amount of time to reduced volume to 5 gal.
20 minutes cool & pitch yeast (1.063 SG)
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grand total of 7 hours
I guess if I drop the protein rest and go right to 155* for the mash temp, correct my sparge time (figure about an hour regardless), and only have a 60 minute boil, that would get me into that 4 - 5 hour slot.
Not sure about my efficiency yet.