Abstract: Because of management system of branch and parent company, investment projects are optimized at two levels of field branch and parent company. Whole optimization model of parent company is established on the basis of projects optimization in field branch company, to resolve investment scheme among the branches. Furthermore, the utility adjustment is used in the model so that decisionmaker′ intention is brought into the optimization model. The study is provided scientific, reasonable, effective and practicable method for investment decision.

Key words: field production projects, holistic optimization, utility adjustment, optimal allocation, decisionmaking