Otherwise known as the 'mixed neural drive / hypertrophy programme'. The system was first developed in either Hungary or Romania and introduced to Western bodybuilders by Charles Poliquin, and is more likely to be utilised by weight lifters than bodybuilders.
The theory is that if you perform a 6 rep max within 3-10 minutes of doing a max single, you will be able to use a greater weight than if you hadn't performed the single.
For example, imagine you are normally able to bench press 220lbs for 6 reps. if you were to perform a max single 4 minutes prior to doing your 6 reps you'll be able to do 225-230lbs which is a significant increase. Most trainees also find that their max single also improves with each wave.
A typical wave might look like this: -
Set 1) 1 rep with 265lbs
Set 2) 6 reps with 220lbs
Set 3) 1 rep with 270lbs
Set 4) 6 reps with 225lbs
Set 5) 1 rep with 272.5lbs
Set 6) 6 reps with 230lbs
I have genuinely seen this work. The basic premise is to use maximal loads to potentiate the nervous system. Because of this newly increased, more efficient neural drive, you can use a greater and stronger load for six reps. I would not base a whole routine on this technique, but I would apply it to one or two different exercises and use it to get through sticking points.
Give it a try!