벡터 개념을 활용한 생태효과성 제안 및 적용

Eco-efficiency refers to a ratio between environmental impact and value(or cost) and it has been used as a sustainable index widely. However, the debate on eco-efficiency has somehow left behind the question of limits; no consideration of a relative size as well as the impossibility of weighting among evaluation factors (parameters). Therefore, eco-effectiveness using a vector concept which represents the position of an object in space in relation to an arbitrary reference point is proposed as a new evaluation index. The case study of washing machine in the end of life stage was performed and the comparative analysis with the eco-efficiency was conducted. Although frame(steel) is the most economic material (or part) in the washing machine, the priority is low in eco-efficiency but the highest priority in eco-effectiveness. As shown in eco-effectiveness formula, it is possible to consider the relative size which can not be considered in the eco-efficiency. Furthermore, it has a benefit to give a weighting factor among evaluation factors (parameters). Although the concept of eco-effectiveness is more beneficial than that of eco-efficiency, there still needs to confirm whether distortion occurs in the result when convert the normal value into the relative value.