抄録
The digital value engineering has been developed as part of research of artifacts. The "digital value" is defined as digital artifacts or services that can produce high economic values. The research topics include the design of flexible digital artifacts, services, and user models. On the basis of these technologies, we have intended to realize the methodology of customization and personalization for digital artifacts. However, we need new criteria and methods for evaluating values, since our sense of value has been diversified, and digital information is not always trustworthy. In this paper, the previous works in the digital value engineering are reviewed at first. And then, we point out as a subject that methodology for valuing digital information is deficient. As a new methodology of the digital value engineering, we will describe a framework based on a notion of "incomplete network environment". This framework supports quantitative valuing of digital information and knowledge creation accompanied by the information.
