Vince's approach on this program is predicated on utilizing percentages of 6 rep maxes, perfect form (as always), one exercise per bodypart, three upper body workouts per week and two lower body workouts per week. It is also the only routine I am aware of for which Vince recommended longer rest periods -- up to 60 seconds.
As with most of Vince's approaches, the ego has no place. One calculates a 6 rep max in a given exercise and this becomes "100%". The 10 rep set is performed with 50% of that number, rest of "up to" 60 seconds is allowed then the 8 rep set is performed with 75% of the 6 rep max, rest up to 60 seconds and go with the 100% for 6 reps, finishing off with 15 reps at 35% of 6 rep max. For a bench 6 rep max of 200#, this would mean 10x100 8x150 6x200 15x70.
Kind of seems undercapacity doesn't it? With the usual sloppy exercise performance most folks utilize, it likely would. But following Vince's recommendations on perfect performance with total focus and concentration on the muscles being worked it really gets the job done.
I think Vince initially came up with this concept to blast someone out of a training rut and to provide some variety from his other programs.