After completing verification and optimisation of the Eco Design (see step 3), the resulting packaging variants need to be assessed regarding their environmental impacts and the outcomes evaluated against the defined objectives (see step 2).
Relevant evaluation tools can be used for some of these reviews. A selection of these tools can be found online in the toolbox for these Guidelines. Depending on the scope and importance of the relevant project, (just) a qualitative assessment can sometimes also be sufficient here.
If none of the verified packaging solutions meets the defined environmental targets, it is necessary to go back to step 2 and check whether the other key requirements can be modified. If this is not feasible, the environmental objectives need to be redefined.
Any conflicting objectives identified must be made transparent and resolved based on environmental priorities.