However, design requirements to the product that might improve the manufacturing process would be highly relevant. Improved durability, extending the products life, is part of waste prevention and thereby improvement of resource efficiency and it should be included in future resource efficiency requirements in the IM and the experiences from the voluntary instruments should be utilised. However, it is important to ensure that prolonging the life span of the product is the environmentally best solution in a life cycle perspective, e.g. that possible environmental benefits are not evened out by increased energy consumption of the older product compared to a newer more energy efficient product. However, the intended ecodesign effects of the WEEE directive is not working properly and this might also be relevant for product categories not covered by the WEEE Directive or for consumables used in the product such as cartridges for imaging equipment.