In reply to Presley Whippet:
What I aim for with periodisation (under normal circumstances) is 4 week blocks of the tried and tested: ARC/base fitness/endurance, Strength, Power, Power Endurance and Performance phases followed by a rest. These phases can overlap.
My thinking is that in that 4 week's you go through initial increase in gains (largely neuromuscular adaptation) and as this diminishes and gains are harder to come by you move on to the next phase.
The order compliments each phase perfectly. ARC increasing your training capacity, increasing strength before increasing power, then utilising that progress in power to power endurance ready to perform.
This can be endlessly adjusted if your goals are boulder/trad related, or adjust to they type of route/goal.
It's certainly not a one size fits all method. it relies very much on being able to time your performance phase down to a few weeks, which I personally struggle with the fickle weather/conditions we have in the North of Scotland!