Nearest solution to references method for multicriteria decision-making problems

In MCDM problems, the decision maker is often ready to adopt the closest solution to the reference values in a choice or ranking problem. The reference values represent the desired results as established subjectively by the decision maker or determined through various scientific tools. In a criterion, the reference value could be the maximum value, the minimum value, or a specific value or range. Also, the acceptances degrees of ranges outside the reference may differ from each other in a criterion. Furthermore, measurements in a criterion may have been obtained with any of the nominal, ordinal, interval, and ratio scales. For the decision problems, including qualitative criteria, the solution cannot be achieved without scaling of criteria with the existing MCDM methods. The purpose of this study is to propose the Nearest Solution to References (REF) Method, a novel reference-based MCDM method, for the solution of decision problems having mixed data structure where references can be determined for criteria

Current Application Fields of ELECTRE and PROMETHEE: A Literature Review

Multi-criteria decision making techniques are widely used today. In this study, it was examined the current usage areas of ELECTRE and PROMETHEE, which are in the class of outranking-based multiple criteria decision techniques, in Turkey and the world. In this regard, the studies carried out in 2016 and the first four months of 2017 were scanned with the help of Google Scholar. Thus, it is aimed to put forward the latest state of development of ELECTRE and PROMETHEE, and to give an idea about their future application forms and fields. As a result, it was seen that application problems of ELECTRE and PROMETHEE in various fields was tried to remove, and designed appropriate methods for special cases in studies. Furthermore, evaluation according to scenario variations, solving complex decision problems with metaheuristics, common usage of hesitant fuzzy implementations, proliferation of group decision preference, increasing the number of applications of hybrid techniques, used softwares, sensitivity analyses, two linguistic approaches taking an important place in fuzzification have been identified as remarkable results

Çok kriterli karar problemlerine yönelik yeni bir ölçek: Aralıklı ve aşamalı tercih-önem ölçeği

Günlük hayatta ve zorluk derecesi yüksek sorunlarda çoğunlukla kararlar verilmesi gerekir. Bu noktada karar verme kavramı, karara ulaşmak için gerekli olan tüm aşamaları içeren süreçler bütünü olarak ifade edilebilir. Kararı veren bir kişi (yönetici, uzman, analist, yetkili, yazılım, yapay zekâ), grup ya da örgüt olabilmektedir. Kararın sorumluluğunu taşıyan kişi, grup ya da tüzel kişiliğe karar verici adı verilmektedir

Multi-Objective Optimization Of Build-Operate-Transfer (BOT) Tender Problem For Private Sector Companies

Today, around the world, Build-Operate-Transfer (BOT) project finance model is used frequently in numerous projects. One key aspect to the success of project company who wishing to gain BOT tender is to prepare a financial package consistent with the expectations of the related participants in accordance with BOT contract. The debt to equity ratio, the concession length and the unit prices are the important financial decision variables to be determined by the project company. The objective of this paper is to present financial optimization model including two different procurement objectives; (1) potential of winning a BOT project and (2) potential of finding debt. The optimization model solved by multi-objective evolutionary algorithm generate a set of pareto solutions to help project company assess the trade-offs between the two competing objectives. To show application of the model, a real airport YİD project in Turkey study is conducted

Project scheduling by means of fuzzy CPM method: An implementation in construction sector

Bu çalışma; gerçek b r nşaat projes n n kr t k yolunun ve tamamlanma süres n n bulanık faal yet süreler söz konusu olduğunda nasıl hesaplanab leceğ n n göster lmes ve l teratürde sık kullanılan durulaştırma yöntemler nden ?-kes m ve ağırlık merkez yöntemler n n bu problem özel nde karşılaştırılması amacını gütmekted r. Çalışmada faal yetlere l şk n süreler, kes n sayılar yer ne üçgensel bulanık sayılar şekl nde bel rlenm ş, ağ d yagramı Graphv z yazılımı le görselleşt r lm ş, kr t k yolun ve proje tamamlanma süres n n bulunması ç n AMPL ceb rsel modelleme d l yle şebeke t p matemat ksel programlama model gel şt r lm şt r. Projeye l şk n kr t k yol ve tamamlanma süres ?-kes m yaklaşımı ve yaygın kullanılan durulaştırma tekn kler nden olan ağırlık merkez yöntem yle bulunarak karşılaştırılmıştır. Ayrıca bulanık sayıların sıralama yöntemler nden olan Yager metoduyla süren n doğruluğu sınanmıştır. İnsana bağlı faal yetlere l şk n süreler n kes n olarak b l nmes n n mümkün olamayacağı düşünces nden yola çıkılarak, l teratürde sıklıkla kullanılan klas k CPM yöntem yer ne bulanık CPM yöntem n n, kes n sayılar yer ne bulanık sayıların kullanılması çalışmanın önem n ortaya koymaktadır. Ayrıca gerçek b r nşaat projes n n anal z ed lmes çalışmanın özgünlüğünü oluşturmaktadırTh s study a ms to show how to calculate the cr t cal path and complet on t me of a real construct on project when there ex sts fuzzy t mes and a ms to compare clar f cat ons methods of ?-cut and centro d method concern ng th s construct on problem. In th s study, durat ons related to the act v t es are spec f ed as tr angular fuzzy numbers nstead of cr sp numbers. Project network d agram dep cted w th Graphv z software after spec fy ng precedence relat onsh ps. For the purpose of f nd ng project complet ng durat on, a network type mathemat cal programm ng model s developed w th AMPL algebra c model ng language. To f nd cr t cal path and durat on, t s ut l zed from ?-cut method for d ff erent ? levels and centro d method wh ch s one of the most w dely used clar f cat on method for fuzzy numbers n the l terature. Otherw se w th Yager's order ng method, ver f cat on of cr t cal durat on s done. It s not poss ble to know exactly durat ons of act v t es wh ch depend on human. Thus, us ng fuzzy CPM method nstead of class cal CPM wh ch commonly used n the l terature and us ng fuzzy numbers nstead of cr sp numbers reveal the mportance of th s study. Furthermore analyz ng a real construct on project composed or g nal ty of the stud