Improved method of the group's aggregated utility

To solve the problem of individual utility enactment in delegation process, an improved method of the group's aggregated utility is presented based on the idea of strategic rationality. The individual utility is divided into two parts: preliminary utility and sub-utility, and their meanings are studied, then the adjusting interval of individual sub-utility with the common knowledge function and under the dynamic condition is discussed. The steps of individual utility enactment are described and an example is given to illustrate the method.