Abstract
In the civil engineering construction industry, two or more companies often form a joint venture in alliance with each other in constructing a large-scale structure. However, in order to create a corporate alliance, it is necessary to select appropriate companies by analyzing diverse pieces of information including their alliance records and technologies. Thus studies are made on methods for evaluating candidate partner companies based on the analysis results of the link structure of Web pages as well as of the web contents through natural language processing. However, the existing method has a problem in that the relationship between companies are not taken into consideration and consequently, therefor it is not possible to take the advantages of alliance into consideration. This study evaluates relationship between companies based on the technology division of the company obtained from its project achievement and the collaboration achievement between companies. Then, validity of the classification results is verified by classifying companies by visualizing based on the evaluation results, and comparing them with the past achievement of forming joint ventures.