models depicted in Figure 1, 2, and 3. It is necessary to mention that in the proposed model oval denotes the beginning of the e-waste management system where the product reaches its end of life and enters the reverse
logistics network, rectangular stands for a process of treatment, parallelogram represents the affecting information
which interrelates with at least one process, and rounded rectangle stands for a terminate situation/process of
treatment. Lines show the material flow and dashed lines the information flow.