Abstract
A product consists of a [One to One Design] concept model combining a unit. The product of various designs corresponding to a demand of each user can be offered now from the thereby most basic design to various product variations. It leads to a user deepening attachment and sympathy to a product, as for this. Furthermore, unitization provides the correspondence at the time of breaking down with the easy repair method of exchange of parts. These can use the product now for a long time. Moreover, even when the product becomes unnecessary, more parts are again used by supplying to a re-use market for every unit still for a long time as a part of product life cycle.
