Redistribution Problem with Excess and Shortage in Relief Supplies

The large scale disaster by a seismic hazard etc. has occurred in the world in recent years. After a disaster occurs, disaster survivors' relief and rescue operations are required. After a time period has passed, there is a place where relief supplies arrive more than necessary, and there are places where relief supplies do not arrive and are in short supply. This study considers the redistribution problem of relief supply for a post disaster. In addition, this study also considers to redistribute relief supplies to the elderly care home which may increase near future as places other than a shelter. There is not always more relief supplies than the total amount of shortage. Then, even if the total amount of shortage exceeds the total available supplies, the model which can obtain a solution is needed. Therefore, this study consider to develop the model which can finds the places where relief supplies are not distributed.