Abstract
The resource-based view theory is one of most widely accepted theatrical perspective in competitive advantage, but it is difficult to explain why the firm can continuously maintain its competitive advantage in dynamic external environment. The Dynamic capabilities theory overcomes this weakness, but this theory remains abstract discussion. There are some statistical researches, but a framework for study specific company is not confirmed. The purpose of this study is to construct a model for sustainable competitive advantage as business system level based on "Differentiation System."