## 3 Results and Discussion
### Step 4: Interpretation
As in the C2C analysis, the materials are evaluated individually; this action should be focused on those that have been classified with typology X (ABC-X assessment): corrugated cardboard, LDPE and paper. The elimination/modification of these materials will be considered. 3. These strategies, linked to the materials, contribute to reducing the following impacts: ionizing radiation (5 \(\times\) 10\({}^{-5}\) DALY), global warming (498.97 Kg CO\({}_{2}\) eq), human toxicity (387.68), SMOG (2781\(\times\) 10\({}^{-13}\) kg 1.4-DB eq), ozone depletion (38 \(\times\) 10\({}^{-5}\) kg CFC-11 eq) and particulate matter formation (0.024 kg PM\({}_{10}\) eq). 4. Similarly, the other categories, Q\({}_{\rm SH}\), Q\({}_{\rm BS}\) and Q\({}_{\rm AS}\), are interpreted. Finally, the process of the macro-stage interpretation will be useful to review and update the Continuous Improvement Plan (CIP) of the product. This involves the proposal of redesigns and strategies, focused on improving the environmental, economic and social performance of the product in successive milestones, marked as periods of improvement. For example, by analyzing the macro-indicator of efficiency (Ey), and considering the Q\({}_{\rm HH}\) category, an E\({}_{\rm R\%}\) value of 0.15 is obtained, i.e., there is a 15% improvement in performance between the current variant and that of the previous period. In addition, an E\({}_{\rm T}\) value of 0.11 is obtained, this being the tendency of change in the improvement plan, throughout all the periods of the evolution of the product, since its launch. As it is greater than 0, the improvement plan is adequate for this impact category. These results indicate that the objective in the next redesign will be to improve the efficiency values, by focusing on the strategies according to the hierarchy of causes, indicated in the previous paragraph. Regarding the macro-indicator of consistency (Cy), cyclicity has a value of 0.6 (an adequate but improvable value, since it must reach 100% cyclicity, or a value of 1). This result implies the existence of practices that reduce the eco-effectiveness of the system, such as energy recovery (0.1) and landfill waste (0.4). Considering the LCV index, a loss of 40% is obtained; therefore, data will have to be improved in the following period as a redesign milestone. Finally, the macro-indicator of sufficiency (Sy) determines, among other requirements, that it will be necessary to reduce the impacts on the product life cycle as, indirectly, these imply a cost increase of EUR 112.7 (value of eco-costs) over EUR 1200 (direct costs of the life cycle of the product). Once the results have been analyzed, improvements focused on the meso-level should be proposed. It is worth highlighting the existence of resources and databases, where strategies linked to environmental, social and economic impact, C2C principles and other eco-efficient and eco-effective methods are collected, such as, for example, [85, 86, 87, 88]. These strategies will be proposed and planned for implementation in the next period of evolution of the product and will be evaluated once it is finished.