Simplest way would be this: you have a rep range, let’s say 6 to 8. When you can do 9 reps, add weight the next session. I’m saying 9 reps because with the Yates philosophy you should go to failure (or beyond). If you fail at 8 I wouldn’t recommend adding weight right now. If you complete 8 and fail at 9 is where most would recommend adding weight but from experience it might exceed someone’s optimal rate of progression and you might hit the wall faster than you want. When you can complete 9 and fail at 10 is where you should add weight. I know it sounds weird to program 6-8 and add weight only when you fail at 10, but that’s how I would recommend it.
Fail at 4-5: too heavy, reduce the weight next time
Fail at 6-8: proper weight,stick to the same one at the next session
Fail at 9-10: ready to add weight (still recommend waiting until you fail at 10).