Browsing Araştırma Çıktıları / WOS by KHAS Author "Aktunç, Esra Ağca"
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Demand Uncertainty And Inventory Turnover Performance An Empirical Analysis of the US Retail Industry Authors:Hancerliogullari, Gulsah; Sen, Alper; Aktunç, Esra Ağca
Publisher and Date:(Emerald Group Publishing Limited, 2016)Purpose - The purpose of this paper is to investigate the impact of demand uncertainty on inventory turnover performance through empirical modeling. In particular the authors use the inaccuracy of quarterly sales forecasts as a proxy for demand uncertainty and study its impact on firm-level inventory turnover ratios. Design/methodology/approach - The authors use regression analysis to study the effect of various measures on inventory performance. The authors use a sample financial data for 304 ...
Managing natural gas demand for free consumers under uncertainty and limited storage capacity Authors:Aktunç, Esra Ağca; Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra
Publisher and Date:(Elsevier, 2020)Demand for energy sources depends on several factors such as population growth, urbanization, industrialization, and climate. Among fundamental energy sources, natural gas is characterized by storage limitations and take-or-pay contracts, which makes it especially critical to forecast the demand accurately for cost management policies. Suppliers of natural gas require take-or-pay contracts to ensure that consumers pay for any unused amount up front; and if the demand exceeds the agreed amount, ...
Multi-objective nurse scheduling with shift preferences in a surgical suite Authors:Aktunç, Esra Ağca; Tekin, Elif
Publisher and Date:(Springer International Publishing, 2017)Nurse scheduling is a crucial part of hospital personnel scheduling. For effective nurse scheduling fair workload and job satisfaction should be taken into account as these factors affect the quality of service in healthcare. In this study monthly nurse scheduling constraints for a surgical suite are determined according to government regulations hospital management requirements and nurse preferences. A multi-objective integer program with hard and soft constraints is formulated and solved as a ...