Abstract
The competitive strategy theory was effective to find a position for strategic rent in the situation with mass production and consumption. The platform strategy theory, on the other hand, is applicable to grow its business ecosystem, where manufacturing capability of products can not be sustainable source of competitive advantage. The scopes of respective theories are quite different, and then, both seem to be mutually independent. That is, it seems to be difficult for us to find real cases that support both theories. In this presentation, however, we show two cases that respective blend of the platform and competitive strategies. The blendings are logically sound and have strong inimitability.