My coach uses prescribed rest periods between sets and reps, depending on how many reps are in the set. Different intensity/differents number of reps = different metabolic pathway. Because the program is a form of linear periodisation, you train different pathways throughout the cycle.
The rest scheme is designed around the optimal period for training to produce the most power when using that metabolic pathway. For example when you're in 5RM territory, your relying a lot on ATP-CP, which takes around 2-3 seconds to regenerate between reps. So you take that extra second to get the most power out of each rep.
10 reps = 5-8 minutes per set, 1 second per rep.
8 reps = 8-10 minutes per set, 1-2 seconds per rep.
6 reps = 10-12 minutes per set, 2 seconds per rep.
5 reps = 12-15 minutes per set, 2-3 seconds per rep.
2 reps = 10-12 minutes per set, 3 seconds per rep.
These are based on intermediate to elite levels.
If you are a beginner you should take a few minutes off each of the between rep rests, eg 10 reps = 3 minutes, 8 reps = 5 minutes, 6 reps = 7 minutes, 5 reps = 8-10 minutes etc. If you take too long a rest, your CNS will de-enervate, and your performance can actually go backwards. Because a beginner is using much lighter weights, CNS recovers much quicker between sets.