This evaluation complements the evaluation of the development time where you fit a model that describes the temperature-dependent development rate for each particular life stage. In case of adult stages ("males" and "female"), because they die instead of developing to a next stage, the final function describes the temperature-dependent senescence rate. ILCYM provides a number of 12 models that might describe well the development curve in insects. ILCYM does not check the appropriateness of each model automatically. You might test several models and select the best one according to the selection criterions AIC and MSC (for further information see next page).