It looks like this: at first you work on increasing number of single rep sets. (roughstrength.com)
For example, you do bench press and continue to increase the weight until you can only do 1 single rep with a particular weight. (coachcalorie.com)
I believe this new model for how muscles function during exercise and how they adapt to exercise explains why a combination program is superior to single rep range training. (trainingscience.net)