Abstract. Reverse Logistics Networks (RLNs) have grown in importance after return policies became compulsory. Lately, questions have been raised whether they e®ectively decrease environmental impact: e®orts to optimize the eco-e±ciency of RLNs through minimizing costs and emissions were deployed, but results are not advancing with the necessary speed. Alternatively, the eco-e®ectiveness (\doing the right thing" for the environment) approach emerges, promoting a supportive relationship, balancing environment and economy. This research aims to model the design (or redesign) process of eco-e®ective RLNs. There are numerous ecodesign tools focusing on product or service design, but an eco-e®ective design process conceived speci¯cally for logistics design purposes is yet to be delivered. Research was carried out using the Design Science Research Methodology and an exempli¯cation for the Poultry Industry was outlined to demonstrate how the process unrolls. The model was conceived using a combination of Upcycling, Industrial Symbiosis, TRIZ rationale and Collaboration for Sustainability. The proposed design process model will help the conception of more innovative, eco-e®ective logistics networks.