Currently various collection strategies are implemented in different parts of the world to collect End-of-Life (EOL) products. Since different collectors in the reverse logistics network will influence the performance of a collection strategy, a suitable collection program is required. The objective of this research is to find an optimum collection strategy to suit various environments by considering the costs and the environmental aspects of collection. To design optimum collection strategies, information on the rate of EOL product returns is essential. Therefore, a methodology is proposed...