Within a process for recycling of PET-material andor objects of PET, the PET-material to be processed is heated and dried in the course of a pre-treatment step and simultaneously is crystallized at elevated temperature. Among power terminals, ground terminals, and signal terminals provided in the semiconductor apparatus, all the power terminals are arranged in one power area and the power area includes only the power terminals. The method also includes identifying a region in a classification space in which the values for the populations are located.