RESEARCH ON THE DECISION MAKING SUPPORT FUNCTION USING THE MARKOV PROPERTY

Summary: The driver sometimes is not satisfied by the route chosen by the Car Navigation System. Therefore, the function and the concept of the current Car Navigation System were examined. It can be said that the driver's subjectivity can be changed based on objective conditions. There are three main results. 1. Derive the objective element, factoring in predicted conditions. 2. Based on a conditional node, make predictions which will make a judgment about the subjective element. 3. Example all possible route and at the conditional node make a judgment about the subjective element based on the weight of all the conditions. The background of the research was obtained from a practical example of decision-making problems. It is a system rapidly spreading throughout Europe, America and Japan. The system can be described a functional part of the car, guiding the driver to the desired destination by the displaying road information. This is called a Car Navigation System in Japan. When this is used, the drivers depend on the map information shown on the display. Based on the input given by the driver, the Car Navigation System shows the most efficient route based on time and distance. Generally, drivers do not drive the most direct route to the destination point. Usually when driving, even if a person preplans the route, he will have a desire to make impulsive stops along the way. Depending on the driver, he might even stop for brief rest to enjoy the view or spend some time on a leisure activity. These types of stops enhances the driving pleasure and are determined subjectively based on the individual driver. The driver can input desired leisure spots into the Car Navigation System. This input causes the Car Navigation System to plan desired stops along the final destination point. However after driving, the driver sometimes is not satisfied by the route chosen by the Car Navigation System. The dissatisfaction is caused by the system's inability to anticipate the driver's immediate need. For example, based on the driver's pretend stop points, the system may direct the driver to a tennis court, but by the time of arrival, it could be raining or the road driven may be congested, slowly the drive. In these cases, the drive to the courts would have been time wasted. The driver's desired stop point is subjective input while the change in weather change or traffic patterns are objective elements. The destination decided is influenced by both of these factors. Even if these are many objective elements, they are transitional so events that may influence can be predicted. Therefore, the function and the concept of the current Car Navigation System were examined. Although the system's function can guide the driver to the desired destination points, but it cannot forecast changes in driving conditions. In the future, there is a prospect for a new function of Car Navigation System based on model designed using an AHP.