scholarly journals Simulation-based robust optimization of limited-stop bus service with vehicle overtaking and dynamics: A response surface methodology

2019 ◽  
Vol 130 ◽  
pp. 61-81 ◽  
Author(s):  
Weitiao Wu ◽  
Ronghui Liu ◽  
Wenzhou Jin ◽  
Changxi Ma
Keyword(s):  
Response Surface Methodology ◽  
Robust Optimization ◽  
Response Surface ◽  
Simulation Based ◽  
Bus Service

Quality PaperMulti-objective optimization of Gas Station performance using response surface methodology

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shervin Asadzadeh ◽  
Behrouz Akhavan ◽  
Behnaz Akhavan
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Queue Length ◽  
Simulated Data ◽  
Optimal Number ◽  
Critical Conditions ◽  
Content Type ◽  
Simulation Based ◽  
Gas Station ◽  
Face Centered

PurposeIn this paper, the performance of a specific gas station (Parvin) has been studied and investigated. The purpose of this research is to design a second-order regression model based on simulated data to optimize the queuing system in line with the fuel sales and costs. Thus, the influential variables including the number of pumps and the number of pump operators need to be optimally determined.Design/methodology/approachThe simulation was combined with design of experiments (DoE) techniques to achieve a predictable model for optimizing Gas Station performance considering both the sales rate and the queue length. First, the Gas Station was simulated with Arena software, and then by using DoE and response surface methodology (RSM), the gas station performance was optimized in terms of three objectives including costs. A face-centered central composite design (CCD) has been implemented to reach the optimal number of pumps and pump workers.FindingsThe results of the optimization model derived from the CCD indicate that the performance of the Gas Station system has been improved considerably. Moreover, after the detailed study of optimization and RSM outputs, it seems that the variations of both the pumps and the number of pump operators have significant impacts on the performance of the Gas Station including costs, sales rate and queue length.Originality/valueIn general, it has been proved that simulation-based RSM can be considered as a powerful and effective technique in both single and multi-objective experimental optimization. The present study has been able to help managers to make decisions and conduct the Gas Station in critical conditions in different hours of a day.

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