Grouping the enterprises in the network of relationship

How can the enterprise group be formed? Can it be explained by global mechanisms or models? The relationship among enterprises is described as relationship degree. Thus, correlation network is built upon enterprise group. The types of relationship among group or between groups are entitled as group inner energy and group outer energy. A 0/1 integer programming model is established for enterprise group to optimize the structure of the group by maximizing group inner energy and minimizing group outer energy. From the view of enterprise, enterprise inner energy and enterprise outer energy are proposed as group. These measures are taken for enterprise to choose group or group to choose enterprise. By simulation, the above models and measures are studied. The organization model of enterprise group built in the study is fundamental for the assessment and evolution of enterprise group.