Alptekin Ulutas

Alptekin Ulutas
Inonu University · Department of International Trade and Business

PhD

About

66
Publications
20,995
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784
Citations
Citations since 2017
64 Research Items
786 Citations
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2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Introduction

Publications

Publications (66)
Article
Full-text available
Supplier selection is an important task in supply chain management, as suppliers have a vital role in the success of organisations in a supply chain. Sustainability has emerged as a solution to decreasing resources and increasing environmental and social problems in the past few decades. It has been applied to various industrial operations, one of...
Article
Full-text available
The purpose of this article is to introduce to the literature a new extension of the Simple WISP method adapted for utilizing the triangular fuzzy numbers. This extension is proposed to allow the use of the Simple WISP method for addressing decision-making problems related to uncertainties and inaccuracies, as well as for solving problems related t...
Article
Full-text available
As governments seek renewable and more sustainable energy resources, wind energy has emerged as one of the most rapidly developing renewable power resources. The relevance of wind energy turbines has grown as more nations turn to renewable energy. A significant criterion that conduces to wind energy’s efficient production is the proper wind turbine...
Article
Full-text available
One of the easiest and most common methods for effectively reducing building energy demand is the selection of adequate thermal insulation materials. Thermal insulation is a substantial contribution and an evident, logical and practical first stage toward improving energy performance, particularly in envelope-load-dominant structures located in dif...
Article
Full-text available
Increasing competition as a result of globalization has forced the businesses to increase efficiency by focusing on the core competencies. This led businesses to outsource logistics. As a result, most of the businesses started to use third-party logistics (3PLs). There are various and conflicting criteria involved in 3PL selection, thus the selecti...
Article
Full-text available
This article presents a comparison of the results obtained using the newly proposed Simple Weighted Sum Product method and some prominent multiple criteria decision-making methods. For comparison, several analyses were performed using the Python programming language and its NumPy library. The comparison was also made on a real decision-making probl...
Article
Full-text available
Background: Uncertainty is the major source of hazards, and it is present in a wide range of business activities. Due to the high level of unpredictability in logistics operations, the logistics sector has traditionally operated in a high-risk environment. These risks have become considerably more complicated as the corporate environment has change...
Article
Full-text available
There are many different multi-criteria decision making methods in the literature. These methods, which enable criteria with different measurement units to be examined together, allow choosing between alternatives. However, different methods can produce different results depending on the data set. The aim of this study is to combine the results obt...
Article
Full-text available
Warehouses link suppliers and customers throughout the entire supply chain. The location of the warehouse has a significant impact on the logistics process. Even though all other warehouse activities are successful, if the product dispatched from the warehouse fails to meet the customer needs in time, the company may face with the risk of losing cu...
Conference Paper
Full-text available
Rapidly changing markets, actors, new legal regulations, information and data intensity have increased uncertainty, and as a result, businesses that want to continue operating in the market need to pay more attention to risk criteria. Risk can be explained as unplanned event which affects a business's overall performance. Logistics practices that d...
Chapter
Freight transportation is one of the most important and costly operations in logistics as economy and society are significantly depended on freight transportation for the sustainability of life. Vehicle selection in freight transportation is a crucial and strategic decision as it requires high investments, and if the desired performance cannot be a...
Article
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The performance effect of construction on energy conservation substantially depends upon application of correct materials and energy saving methodologies. A sizable financial impact is accomplished through insulated walls. The criteria explaining the present wall insulating material options may have different values. Furthermore, they may alter in...
Article
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Nowadays, customers are not only interested in the quality of products, but they also want to have these products in a timely manner. The managers of an organization are faced with two problems when the distribution of products is in question, namely: (1) customers are usually geographically dispersed and (2) transportation should be performed in a...
Article
Full-text available
The environment in which the decision-making process takes place is often characterized by uncertainty and vagueness and, because of that, sometimes it is very hard to express the criteria weights with crisp numbers. Therefore, the application of the Grey System Theory, i.e., grey numbers , in this case, is very convenient when it comes to determin...
Article
Full-text available
The environment in which the decision-making process takes place is often characterized by uncertainty and vagueness and, because of that, sometimes it is very hard to express the criteria weights with crisp numbers. Therefore, the application of the Grey System Theory, i.e., grey numbers, in this case, is very convenient when it comes to determina...
Article
This article aims to propose an approach for determining reliability of information collected using questionnaires and bipolar neutrosophic sets. Bipolar neutrosophic sets use six membership functions that express the truth membership, the falsity membership, as well as the indeterminacy membership to the set and complementary set. Therefore, bipol...
Article
Full-text available
Some decision-making problems, i.e., multi-criteria decision analysis (MCDA) problems, require taking into account the attitudes of a large number of decision-makers and/or respondents. Therefore, an approach to the transformation of crisp ratings, collected from respondents, in grey interval numbers form based on the median of collected scores, i....
Article
Full-text available
Some decision-making problems, i.e., multi-criteria decision analysis (MCDA) problems, require taking into account the attitudes of a large number of decision-makers and/or respondents. Therefore, an approach to the transformation of crisp ratings, collected from respondents, in grey interval numbers form based on the median of collected scores, i....
Article
Until now, many different multiple criteria decision-making methods have been proposed for the facilitation of different business problems such as entrepreneurial. In this article, a new approach for selecting the most acceptable alternative is considered, which is based on the integration of weighted sum and weighted product approaches. The basic...
Article
Full-text available
Enterprises need to work with a proper third-party logistics provider to reduce costs and increase their logistics performance; so the third-party logistics (3PL) provider selection problem is a significant one for them. in this study, grey step-wise weight assessment ratio analysis (SWARA) and grey combinative distance-based assessment (CODAS) are...
Article
Full-text available
The establishment of a textile manufacturing facility in any city of a country is a very significant decision since it will have a significant positive effect on the economy of both the city and the country and reduce unemployment in the city. Even though it is a very important decision to establish a textile manufacturing facility, there are very...
Article
Full-text available
The main aim of the article is to propose a new multiple criteria decision-making approach for selecting alternatives, the newly-developed MULTIMOOSRAL approach, which integrates advantages of the three well-known and prominent multiple-criteria decision-making methods: MOOSRA, MOORA, and MULTIMOORA. More specifically, the MULTIMOOSRAL method has b...
Article
Full-text available
The main aim of the article is to propose a new multiple criteria decision-making approach for selecting alternatives, the newly-developed MULTIMOOSRAL approach, which integrates advantages of the three well-known and prominent multiple-criteria decision-making methods: MOOSRA, MOORA, and MULTIMOORA. More specifically, the MULTIMOOSRAL method has b...
Chapter
Full-text available
Meeting the energy requirements with imported fuels leads to economic and political problems in the countries. Therefore, renewable energy investments continue to grow globally as a sustainable and increasingly economically viable alternative to conventional sources of energy. This study aims to reduce the share of imported fuels in Turkey's electr...
Article
Full-text available
There are many different multi-criteria decision making methods in the literature. These methods, which enable criteria with different measurement units to be examined together, allow choosing between alternatives. However, different methods can produce different results depending on the data set. The aim of this study is to combine the results obt...
Article
Full-text available
People represent one of the most significant resources of an organization, and therefore, personnel selection is one of the problems that organizations have increasingly been facing. The criteria that influence the final decision are usually opposing, so the application of multiple-criteria decision-making methods (MCDM) represents a suitable way f...
Article
Full-text available
The main goal of this paper is to propose a Multiple-Criteria Decision-Making (MCDM) approach that will facilitate decision-making in the field of logistics—i.e., in the selection of the optimal equipment for performing a logistics activity. For defining the objective weights of the criteria, the correlation coefficient and the standard deviation (...
Chapter
Full-text available
This study has three objectives. First, there are many publications in the literature on the countries of transition economies. However, there are few publications in the literature on the logistics performance of countries of transition economies. This study analyses the logistics performance of countries of transition economies to fill this resea...
Article
Full-text available
Neutrosophic sets have been recognized as an effective approach in solving complex decision-making (DM) problems, mainly when such problems are related to uncertainties, as published in numerous articles thus far. The use of the three membership functions that can be used to express accuracy, inaccuracy, and indeterminacy during the evaluation of a...
Article
Full-text available
zet Ülkeler lojistik sektöründeki performanslarını değerlendirmek ve lojistik sektöründeki hedeflerini belirlemek için lojistik performans endeksini (LPI) dikkate almak zorundadırlar. LPI değerleri, her iki yılda bir Dünya Bankası tarafından yayınlanmaktadır. LPI listesindeki sıralamalar ülkeler için önemlidir. Böylece ülkeler lojistik sektöründe d...
Conference Paper
Full-text available
Özet Malzeme taşıma sistemleri, hem üretim hem de hizmet sektöründe önemli bir yere sahiptir. Malzemelerin yüklenmesi, taşınması ve depolanması vb. faaliyetlerin yapılmasında kullanılan bu sistemler hem üretimin hem de hizmetin verimliliğini etkilemektedir. Konveyörler, iki sabit nokta arasında sürekli veya aralıklı malzeme taşınmasını sağlayan mal...
Chapter
Logistics is a key factor for companies to sustain their businesses, to gain the competitive advantage in the market, and to speed up the transportation process. Companies can perform their own logistic activities using their own core competencies; however, they can face huge logistics costs. To avoid these logistics operating costs, companies need...
Chapter
As the performance of suppliers directly or indirectly affects the performance of the companies with which they engage, working with the most suitable supplier has become the key to success for companies. When solving the supplier selection problem, many different criteria involving qualitative and quantitative criteria are considered. Therefore, t...
Conference Paper
Full-text available
Türkiye’nin bazı bölgelerinde elektrik kesintileri uzun süreli ve sıklıkla yaşanmaktadır. Bu kesintiler hem bireysel hayata hem de kurumsal hayata zarar vermektedir. Kurumların elektriğinin olmaması ile birçok işler aksamaya uğramakta ve çeşitli gecikmeler yaşanmaktadır. Bu gecikmeler, maliyetlerin artmasına sebep olmaktadır. Bu gecikmelerin önüne...
Article
Supply chain management determining the competitive position of corporations in a rival and fast-changing environment is one of the favourite topics in engineering economics. Since the performance of suppliers affects the performance of the whole supply chain, the selection of a supplier is a significant problem in supply chain management. When sol...
Article
Full-text available
Countries can check the performance of their logistics’ activities to determine their competitiveness in trade logistics. One way to check these performances is to analyze the country’s LPI value in detail which is released by the WB every two years. When calculating the LPI, six indicators (criteria) are taken into account. The weights (importance...
Article
Full-text available
Landfill is the most common method used to eliminate municipal solid waste in developing countries. As in all developing residential units, Sivas city is also encountering a major solid waste problem menacing both public health and environment. This study analyzes the 7 criteria (geological structure, land ability class, transportation, groundwater...
Article
Full-text available
Hosting Olympic Games is a significant opportunity for every country and her metropolitan cities. Olympics offer several benefits to the Host countries and cities such as introducing cultural assets of the country to the world and increasing economic value of the country and city Olympics held. Countries and cities wishing to host Olympic Games hav...
Article
Full-text available
Sustainability" term has not only become increasingly important globally for individual companies, but also become important for whole supply chains. The selection of supplier is a significant decision for the sustainability of supply chains. Literature review revealed that supplier selection is made traditionally based on economic attributes which...
Chapter
The internet has become an indispensable tool for humanity to access any knowledge. Many companies use the internet to provide their customers with information about their organizations. Website development is a tiring process that requires huge investments. If the performance of the website falls below the expected performance, it will have a nega...
Chapter
Full-text available
Meeting the energy requirements with imported fuels leads to economic and political problems in the countries. Therefore, renewable energy investments continue to grow globally as a sustainable and increasingly economically viable alternative to conventional sources of energy. This study aims to reduce the share of imported fuels in Turkey's electr...
Article
Full-text available
Üretim için vazgeçilmez bir girdi olan enerji, üretim ve tüketimiyle çevre ve insan sağlığı üzerinde negatif dışsallıklara neden olmakta ve ülke kalkınmasına zarar vermektedir. Bu nedenle ülkeler enerji kaynağı seçimi yaparken iki temel motivasyonla hareket etmektedir. İlki enerji kaynağının sağladığı üretim artışını ve rekabet gücünü dikkate alara...
Article
Full-text available
In corporations, the aim of classical profit maximization has left its place to value maximization. The performance criteria based on market value increased with the influence of improvements such as increase of business stakeholder numbers, increase in number of publicly traded companies, enlargement of company scale and global qualification. As a...
Article
Full-text available
Lojistik, üretim yapılan fabrikalardan/işletmelerden son tüketiciye kadar olan süreçlerde bilgi ve malzeme akışının yönetilmesi olarak kısaca tanımlanabilir. Teknolojik ilerlemeler ve küreselleşme ile birlikte lojistik sektörü giderek önem kazanmıştır. Lojistikte malzeme ve bilginin akışının doğru bir şekilde gerçekleştirilmesi için doğru bir yerde...
Article
Full-text available
Son yıllarda teknolojinin gelişmesiyle insanlar bilgisayarsız bir yaşamı düşünememektedirler. Bu durum kurumlarda da geçerliliğini korumaktadır. Kurum ile ilgili çalışmaların yapılması için personellerin bilgisayar kullanması şarttır. Bu çalışmada bir işletmeye dizüstü bilgisayar seçiminde yardımcı olabilmek için bir bütünleşik çok kriterli karar v...
Conference Paper
Full-text available
Even though efforts to reduce production costs in the search for alternative energy have played an important role in the past, today, especially with the support of international organizations, the search for alternative energy, which is sensitive to the environment and human health, place on the forefront. The most powerful of these alternatives i...
Conference Paper
Full-text available
Ülkeler enerji politikalarını oluştururken iki temel konuya fazlaca önem vermektedirler. Bunlardan ilki enerji maliyetlerinin amaçlanan ekonomik büyümeyi destekleyecek biçimde düşük olması ikincisi ise enerji kaynak seçiminin ülkenin sosyal kalkınmasına zarar vermeyecek biçimde olmasıdır. Hangi konunun öncelikli olacağı ülkenin kalkınmışlık düzeyin...
Article
Full-text available
İşletmelerde yöneticiler çok kriterli karar verme (ÇKKV) problemleri ile sıklıkla günlük iş yaşamlarında karşılaşmaktadırlar. Özellikle, satın alma bölümünde çalışan yöneticiler ÇKKV problemleri ile makine, malzeme ve ekipman alımında sıklıkla karşılaşmaktadırlar. Özellikle yüksek teknoloji içeren bir makinenin alımı önemli bir karar verme problemi...
Article
Full-text available
zet Ticari mal taşımacılığı, ürünün toplam maliyetini etkileyen önemli bir maliyet unsurudur. Araç rotalama problemi 60 yıl önce ticari mal taşımacılığının maliyetini azaltmak hedefiyle ortaya çıktı. Literatürde bu sorunu çözmek için önerilen birçok yaklaşım ve model vardır. Bu çalışmada, Sivas'ta bir fırının araç rotalama problemini çözmek için ta...
Article
Full-text available
Bu çalışma Türkiye’nin elektrik üretiminde yenilenebilir enerji payının %100 olması halinde sektöre yapılacak ilave yatırımların istihdamda sağlayacağı artışı tahmin etmektedir. İlave yatırımlarda hangi yenilenebilir kaynağa ne kadar pay ayrılacağı COPRAS çok kriterli karar verme yöntemiyle belirlenmiştir. COPRAS’a göre belirlenen yenilenebilir ene...
Conference Paper
Full-text available
Supplier selection has become an important topic with the increasing of outsourcing activities of manufacturing companies. Supplier selection is a complex multi-criteria decision problem including qualitative and quantitative criteria, which may be uncertain. In this paper, we proposed a hybrid model including analytic network process (ANP), fuzzy...
Article
Full-text available
Supplier evaluation and selection (SES) problems have long been studied, leading to the development of a wide range of individual and hybrid models for solving them. However, the lack of widespread diffusion of existing SES models in the industry points to a need for simpler models that can systematically evaluate both qualitative and quantitative...

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Projects (3)
Project
Dear Colleagues, We cordially invite you to give your valuable contribution to the unique Special Issue on “Multiple-Criteria Decision- Making and Computational Intelligence: Recent Applications“ which will include recent developments and applications in the two areas: Multiple-criteria decision-making (MCDM) and Computational intelligence (CI). Topics include, but are not limited to: - Decision theory and methods; - MCDM in management; - MCDM in engineering; - Fuzzy, neutrosophic, and grey MCDM methods; - Decision support systems; - Group decision-making; - Computational intelligence; - Fuzzy systems; - Artificial neural networks; - Evolutionary computing; - Data mining and text mining; - Probabilistic methods; - Computational learning theory. For detailed information about the SI please visit the following link: https://www.mdpi.com/journal/axioms/special_issues/Multiple_Criteria_Decision_Making_Applications Best Regards, Prof. Dr. Darjan Karabašević Prof. Dr. Dragiša Stanujkić Prof. Dr. Gabrijela Popovic Prof. Dr. Alptekin Ulutaş Prof. Dr. Muzafer Saračević Guest Editors
Project
https://www.igi-global.com/publish/call-for-papers/call-details/5448 Dear colleagues, We have commenced a new book project. In our book, optimization and decision-making methods will be used to analyze/evaluate renewable energy sources. We look forward to your valuable contributions.
Project
Developing a new grey MADM