Abstract
The opinion information of the user about goods and service which are sold on Web is used for the decision aiding of merchandise purchase, and development of a new product and new service. However, a user's opinion information is evaluated based on evaluation criteria defined in advance, or is description by the free format, and it has been a subject that evaluation which the user needs has not been performed. Using the opinion information in Web, by analyzing user requirements, the new evaluation criteria to a product are generated and reexamination of the viewpoint of evaluation is supported in this research. This will enable to emerge user's demand to the products, and it leads to analysis of user requirements, such as a product development project and support of project performance evaluation.
