To determine the weight vector and to aggregate the individual opinions are necessary steps in the classical methods for multi-criteria group decision-making problems in which the weight vectors of the decision makers and the criteria are incompletely known. In this paper, we propose a simple...

Based on Jacquet-Lagreze's permutation method, QUALIFLEX is an outranking model that investigates all possible permutations of alternatives with respect to the consequences of all criteria. The purpose of this paper is to develop a QUALIFLEX-based method for multiple criteria group decision...

Multiattribute decision making (MADM) with multiple formats of information, which is called heterogeneous MADM for short, is very complex and interesting in applications. The purpose of this paper is to extend the Linear Programming Technique for Multidimensional Analysis of Preference (LINMAP)...

In the context of interval-valued intuitionistic fuzzy sets, this paper develops nonlinear assignment-based methods to manage imprecise and uncertain subjective ratings under incomplete preference structures and thereby determines the optimal ranking order of the alternatives for multiple...

In this paper, we study group decision-making problems based on intuitionistic preference relations. By measuring the uncertain information of intuitionistic preference relations and the average similarity degree of one individual intuitionistic preference relation to the others, we propose a...

We shall extend the notion of a K-proximity relation and its properties into an intuitionistic fuzzy sense. We generate an intuitionistic fuzzy K-proximity by a given fuzzy K-proximity in different forms. Also, intuitionistic fuzzy K-proximity mappings and its properties are considered.

A special kind of lattice valued intui-tionistic fuzzy sets is introduced and investigated. Connections with all the previously introduced definitions are shown. Properties of cut subsets are deduced. Hesitancy margin for such fuzzy sets is also introduced. Conve-nience of new notions in...

This paper presents a method for defining a consistent market through the interpretation of different agents´ opinions. We suppose that every agent has his own opinion about the other agents being his possible competitors or not. These opinions are ex-ante defined and therefore (for a...