Browsing by Author "Ayağ, Zeki"

Now showing items 1-5 of 5

  • A fuzzy AHP approach for financial performance evaluation airline companies 

    Authors:Gürel, Sinem
    Publisher and Date:(Kadir Has University, 2012)
    Previous researches focused on operation performance. This thesis purposes for evaluating the financial performance of the airlines. In order to achieve financial objectives to be incorporated into the financial performance of their degree. It is a method to measure the results of a company?s operations in a monetary term. The problem is modeled by multi-criteria decision making (MCDM) one. Multi criteria decision making (MCDM) is a method of the most important fields of operations research and ...

  • A fuzzy AHP-VIKOR approach for evaluation of educational use simulation software packages 

    Authors:Samanlıoğlu, Funda; Ayağ, Zeki
    Publisher and Date:(IOS Press, 2019)
    In this study, an intelligent, integrated approach is presented to help educators select the best simulation software package. Selecting the best simulation software package for educational use is a complex multiple criteria decision making (MCDM) problem with several potentially conflicting quantitative and qualitative criteria. In this paper, two fuzzy MCDM methods; fuzzy Analytic Hierarchy Process (F-AHP) and fuzzy VIsekriterijumska optimizacija i KOmpromisno Resenje (F-VIKOR) are integrated ...

  • Minimizing the defect rate using six sigma DMAIC method; a case study in SUPSAN A.Ş. 

    Authors:Aslan, Nazmiye Yağmur
    Publisher and Date:(Kadir Has University, 2016)
    Today manufacturing industries are highly impacted by the fast changing economic conditions. In this scenario, manufacturing industries become face to face with global competition due to globalization. The major problems of these industries are declining profit margin, customer demand for high quality product and product variety. Therefore so many organizations, especially in manufacturing sector, understand the importance of quality. Companies try to implement various strategies and innovations ...

  • A network model for the location-routing decisions of a logistics company 

    Authors:Sama, Funda; Yücekaya, Ahmet; Ayağ, Zeki
    Publisher and Date:(Institute of Industrial Engineers, 2012)
    In this paper, part of the logistics network of one of the leading logistics companies in Turkey is analyzed. Data related to the candidate warehouse locations, supplies and demands of customers are collected. A network model is developed in order to reconfigure the logistics network. The aim of the mathematical model is to help decision makers decide on the locations of warehouses, as well as routing products from suppliers to the distribution center; from distribution center to warehouses; and ...

  • Six sigma project evaluation under fuzziness in food industry 

    Authors:Şentürk, Özlenen
    Publisher and Date:(Kadir Has University, 2013)
    Modern-day business world is under constant development at production and service market. Common purpose is to return profit by optimizing costs and raise customer satisfaction to maintain acquired success. It is observed at processes that more service and production are provided by less work force. In food sector which is one of the best known service and production areas, if there will be a new production system "knowledge" should be used as base. On the other hand it is necessary to focus on ...