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Item type:Publication, P-Median Model for Locating Emergency Flood Shelters(2023-01-01)Na Ayuhdya, Wichitsawat SuksawatNong Khai and Udon Thani provinces since these two provinces are on the south bank opposite Vientiane. However, Floods during the monsoon season caused problems, and the drainage infrastructure project is not complete. Therefore, the authority must prepare a response, mitigation, and recovery plan. So, the key element of this plan is to find suitable locations for emergency flood shelters while reducing transportation costs. In this paper, the scenario-based facility location model was used to locate emergency flood shelters. Historical data for detour routes and population size were also incorporated. Two scenarios were run. The optimization model was tested against data from the years 2017, 2018, and 2019. Numerical results show that Mueang Udon Thani and 3-Nong Han are the key districts for emergency flood shelters. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Facility location problem with data uncertainty for quality rice development(2016-01-18)Rice is one of the most important agriculture products for Thailand. Thailand has exported rice since Ayutthaya period. Under a highly competitive environment among rice exporters, Thailand's low grade rice is not competitive in the market. Thailand exporters change their strategy by entering into niche market. To gain competitive advantage, quality and safety of rice must be maintained either for domestic market or international market. The quality refining rice facility is an important factor to improve quality of rice and ensure consumer's safety. The location of quality refining rice facility determines the overall distribution cost. The paper first formulates the problem as p-median and then presents a robust counterpart optimization model to address data uncertainty of rice production in farming area in Thailand. The proposed model is tested against rice production data in Thailand from 2008 to 2012. The results show that Bangkok, Chonburi, Nakorn Ratchasima, and Nakorn Sawan are selected to be quality refining rice facility sites.