In open source development community supported by spontaneous volunteers, personal interests, technical capabilities, hunger for fame, and the satisfaction of contributing to public goods are said to be motivated to participate. In that community, companies always play assistant roles, and integrate the result of OSS into their business activities.
However, in Eclipse open source community, a main role of OSS development activities is done by companies. The relationship of individuals and companies is reversed. Therefore, it becomes important to keep the motivation of the development community, promote innovation and link the activities to the profit of a company. In other words, management of co-creation and competition is being done at the same time.
This paper attempts to identify a structure of co-creation in an OSS ecosystem led by companies considering Eclipse as one case. It also suggests a co-creation process model to promote sustainable development for open source ecosystem by two axes: 1) value sharing and value taking, and 2) quantitative development and qualitative development. Some mechanisms that drive this process are embedded everywhere in Eclipse ecosystem. In addition, some issues of Eclipse ecosystem that occurred by the reversal of the position of individuals and companies are discussed.