With the aging of society and the spread of a universal design philosophy, knowledge of the physiological characteristics of the elderly is indispensable in the design of environments or consumer products. Knowledge of human characteristics alone, however, will enable us successfully to realize such human-centered design. The most fundamental steps for these applications are not only acquiring the human characteristics data that are needed for the design, but also translating these data into design values. Such a translation is generally difficult, and the method for it must be systematized. In upgrading the translation method, it is important that information related to various good and bad design examples is accumulated in addition to citing data obtained in the laboratory.