INOUE Masato    Department   Undergraduate School  , School of Science and Technology    Position   Professor
Language	English
Publication Date	2013/07
Type	Academic Journal
Title	Disassembly System Design with Environmental and Economic Parts Selection using Recyclability Evaluation Method
Contribution Type	Co-authored (other than first author)
Journal	Journal of Japan Industrial Management Association
Volume, Issue, Page	64(2E),pp.293-302
Author and coauthor	Kento Igarashi, Tetsuo Yamada and Masato Inoue
Details	To promote a closed-loop supply chain for assembly products, disassembly systems are required to recycle End-of-Life (EOL) products. To increase the total recycling rate of a product at the disassembly systems, it is desirable to keep rather than destroy parts since disassembly costs are increasing. Therefore, a disassembly system design is considered by selecting parts to disassemble in order to minimize the recycling cost while maintaining the recycling rate. On the other hand, since the precedence relation among disassembly tasks of the product also changes with these parts selection, it is required to consider allocation of the tasks in designing a disassembly line. For the disassembly system design, disassembled product information is also necessary such as the recycling rate and profit of each part, disassembly task times and a precedence relation among the disassembly tasks. This study proposes the disassembly system design with environment and economic part selection, which harmonizes the recycling rate and cost by using Recyclability Evaluation Method (REM) provided with Hitachi, Ltd. The first step is to optimize environmental and economic parts selection with integer programming, and the second step is the line balancing in terms for reducing the number of stations. Next, a design example is shown and discussed by preparing a 3D-CAD model for computer and cleaner. Finally, the product and line evaluation are carried out by comparing among 4 scenarios, such as 1) All parts disassembled, 2) Recycling rate maximum, 3) Recycling cost minimum and 4) Recycling rates and cost coexistence. It is demonstrated that the recycling cost was reduced maintaining higher recycling rate and that the numbers of work stations and the smoothness index were also improved with the environmental and economic parts selection.