抄録
Recently, we must depart from the traditional paradigm of mass production, consumption, and disposal. Especially, technologically innovative products are discarded before their breakdowns because of the deterioration of their value. To break away this social circumstance, environmentally conscious product design methods such as reuse, recycle, and upgrade product design method have been studied. An upgrade product design method develops to increase the product's value and inhibit the disposal by exchanging only a few components closely related to its deterioration in value. This method predicts the required future performance criteria and functions and designs products in advance to be compatible with anticipated product upgrades. Hence, designers are required to take account of the uncertain design information associated with future prediction. In the conventional research, proposed methods typically focus on the physical performance improvement. Therefore, these proposed methods couldn't deal with the amount of the environmental load reduction quantitatively. Hence this paper proposes an upgrade product design method that satisfies required uncertain future product performance criteria and functions and adverse effects related to product upgrading concurrently by applying a preference set-based design method that can obtain ranged sets of design solutions that optimally satisfy multi-objective requirements. In addition, this paper evaluates the amount of the environmental load reduction in production phase by applying proposed upgrade product design method to design problem of a laptop PC.
