Theory provide principles for specific decision-making process (or spontaneous), as well as programs to provide decision-making for the purpose of guiding ideology, and to help decision-making to accommodate from different periods, hell to the knowledge accumulation and cultural background.
As a group of interconnected concept, they will be able to use the development of cognitive psychology to display the information how to efficient processing.
Scientists have these tools can make policy in the limited time, resources and environment as to achieve the maximum of the possibility of rational decision making.