Abstract
The purpose of the paper is to propose an analytical framework for examining the change of the competitive advantage about business characterized by industrial modularization. The framework is based on the assumption that the competitive advantage of business characterized by industrial modularization is fundamentally determined by what kind of industrial modules to hold.As a case of applying the framework, the paper analyzes and predicts the changes of competitive situation in the Internet service provider business (ISP). The practical validity of the framework is demonstrated through explaining the historical changes of the competitive situation and trying the prediction. As a result, the validity of the above hypothesis is also checked by the demonstration.
