Physical and chemical thermally-induced processes are usually better understood by following their kinetics. Generally, complex materials are composed of more compounds which undergo parallel processes when subjected to a certain temperature regime; therefore understanding their thermal behaviour is not a simple task. The TKS-SP software package [1,2] contains a multitude of possibilities for performing the kinetic analysis of various thermally induced processes that are monitored by thermal analysis equipment. Recently reported, the advanced linear local kinetic methods of Tang&Chen [3] and Ortega [4] consider the activation energy to be constant on a restricted range of conversion degree (the temperature integral is defined on a fixed interval of conversion degree). However, the first model-free kinetic method of this type was proposed by Popescu [5], but is an isothermic linear method rather than an isoconversional linear one; later, Vyazovkin [6] has proposed the same procedure for an isoconversional method, but this time of non-linear type. By using this approach, the values obtained by these methods will describe a continuous variation when they will be defined on conversion ranges that are big enough to avoid local experimental fluctuations [7]; in particular, the case of biomass and coals is discussed, eventual fluctuations relating to the chosen Δα chosen value and to the complexity of the local environment at the “moment” of the investigation.