Abstract
Recently, it increases the importance of concern for 3R (Reduce, Reuse, Recycle) at the design phase of manufactured product toward creation of a recycling society with a low impact on the environment. Especially, improvement of product disassembly efficiency is essential to concern for Reuse and Recycle. Therefore, in this study, we take up office furniture as one of manufactured product, and disassemble experiment on them, analyze their experimental data. Then, we make a quantitative assessment of office furniture disassembly efficiency by the Design for Disassembly Assessment Index that we developed to make a quantitative assessment of manufactured product from the experimental results. In addition, we aim at the proposal on the design method of disassembly of office furniture.