A Closed-loop Manufacturing System focusing on Reuse of Components

Environmentally conscious manufacturing has gained more and more interests in recent years. For achieving it, closed-loop manufacturing system where products are made from used products, parts and materials taken-back from market, as well as new ones, should be established. Focusing on factories, complicated fluctuations of amount, quality, and timing of these taken-back resources make effective planning and control of these factories very difficult. In this paper, a conceptual factory model of a closed-loop manufacturing system is designed considering material flow, with these various kinds of fluctuations. It also illustrates a prototype factory model that has developed for aiming at handling these fluctuations