3. function of plan
It arranges reasonably the plans of each functional department in accordance with the restrictions afforded by enterprises and provides the appropriate planning reports according to different management.
4. function of control
It monitors and inspects the operation of plans and comprises with the differences between operation and plan in accordance with the data afforded by every functional department, and be assistant to managers to control timely each method by analyzing the reasons why the differences comes into being.
5. function of assistance
It derivates instantly the best answers of related problems by applying to various of mathematics' mode and analyzing a plentiful data stored in computers in the hope of using rationally human resource, financial resource, material resource and information resource for relative abundant economic benefits.