Abstract
New introduction of the third modularity measure to the environmental conscious product design system collaborating with the conventional first-and second-modularity measure, enables the system to be reflected from the disassembly time of the products. The disassembly operation will be commonly carried out by hand with rotation of used appliances in disassembly process, and the loss time by the rotation makes the process efficiency worse. Then the introduction of the third modularity measure will be very important to evaluate the design in circulatory society promoting reuse of parts and recycle of materials by the way of disassembling.
For the illustration of the efficiency of the third modularity measure, the demonstrative experimental results of the disassembly time have been shown by making use of the trial on wooden boxes assembled by screws.
