Attakorn Jaruthien.. A study of inbound logistics to reduce cost and waiting time using loading service station in sugar industry : an application of mathematical programming and geographic information system (GIS). Master's Degree(Industrial Engineering). Mahidol University. Mahidol University Library and Knowledge Center. : Mahidol University, 2014.
A study of inbound logistics to reduce cost and waiting time using loading service station in sugar industry : an application of mathematical programming and geographic information system (GIS)
Abstract:
The problem facing the sugar industry in Thailand is the low quality of product as a result of sugar production efficiency, lengthy transportation distances due to poor transportation management, and other factors involved in the production process. This research is aimed to study the inbound transportation logistics management system needed to improve the value and productivity of sugar cane production. GIS (Geographic Information System) is used in designing and selecting the suitability area as a hub-and-spoke system for distribution. VRP (Vehicle Routing Problem) and mathematical models are used to find the optimal transportation cost and capacity for operational planning. New transportation models with appropriate hub locations derived from k-mean clustering and vehicle routing technique can improve overall sugar cane inbound transportation system. The number of trips reduced from 1,200 in the traditional transportation method to 279 and 800 trips for new model 1 and 2, respectively. The queuing time was drastically reduces from 28 hours in the traditional method to 6.5 hours and to 10.5 hours in the new model 1 and 2, respectively. Additionally, the transportation distances and costs were reduced by 27% and 25.6%, respectively, in the new transportation model 1 and reduced to 20% and 18%, respectively, in model 2.