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Browsing Journal Articles by Author "Athisarn Wayuparb"
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ItemAn application of the savings method to a vehicle routing problem(Assumption University Press, 2017) Chatsuree Kamthornsawat ; Athisarn WayuparbThis paper presents the authors’ research study of the vehicle routing practices of a transport company. This firm provides the delivery of Printed Circuit Board Assembly (PCBA) and electronics components to customers in the Bangkok Metropolitan Region and neighboring provinces in the Central and East regions of Thailand. Currently, traditional truck management is being practiced: this lacks a systematic approach by using only personal experience information.The inefficient truck management problem in this case study was identified as a Capacitated Vehicle Routing Problem (CVRP). Therefore, the ‘Savings Method’ designed by Clarke and Wright (1964) was applied to solve the CVRP, using Excel worksheets. The method consists of four procedures. Firstly, identify the distance matrix from the depot to all customers. Secondly, identify the savings matrix. Thirdly, assign customers to the vehicles or routes, in which the highest value is the criteria for selection. Lastly, sequence the customers within these routes. The research results show that the Savings method reduces the total number of vehicles usage and total distribution distances by 16.46% and 15.70% respectively, and increases truck utilization of truck capacity by 19.70%. These results create significant cost saving for the company.
ItemRisks posed by uncertainties in the supply chain(Assumption University Press, 2018) Lawrence, Brian C. ; Athisarn WayuparbCompetition today is so savage that it creates uncertainties a real threat to an organization’s survival. Creating and managing supply chains is a method for controlling these uncertainties. This paper examines empirical research from postgraduate students and scholarly papers published in the journal of an international university in Thailand, on supply chain techniques.