Periodisation assumes stability and predictability of time frames and progression, which is often not the reality of most sporting contexts. I am a great fan of plans being fluid and dynamic, so I mentioned autoregulation (AR) a few posts back. AR enables elements of individualisation to be implemented into a periodised plan,by adjusting the training according to the recovery, performance and readiness of the individual.
AR can take many forms. For example, an athlete can select the intensity of their session based on their readiness to train. Likewise, athlete load progression only occurs when a training target is met (e.g. 5 sets of 5RM), can also be thought of as AR training. One AR approach I especially like is where load prescription is based on a repetition in reserve (RIR) rating of perceived exertion (RPE) scale, rather than a percentage of a pre-test 1RM 9 (see Figure).
Eric Helms found that all else being equal that RIR-based RPE scale was at least as effective, and probably more effective to a small degree compared to percentage 1RM loading in resistance trained male power lifters. To find out more on this form of loading, check this out.