This might sounds like a stupid quesiton but what do people mean when they say 2-2-1 or other variations of that when smoking ribs?
No one mentioned temperatures! IIRC, these numbers relate to a smoker running about 225 or less. When I try 3-2-1 in my drum, I can't pick up my ribs! They fall apart completely. Like Johnny said, use these numbers as a guide...Your Mileage May Vary...
So make allowances for different types of cookers, and for what your smoker likes to run at.
Makes for more experimenting!!