In group decision making problems, it is almost impossible to have a homogeneous group of
decision makers whose experiences, attitudes, knowledge are the same or similar …

Aggregation operators consist of mathematical functions that enable the combining and
processing of different types of information. The aim of this work is to present the main …

Many real-world decision making (DM) problems present changing contexts in which
uncertainty or vagueness appear. Such uncertainty has been often modeled based on the …

The key objective of the proposed work in this paper is to introduce a generalized form of
linguistic picture fuzzy set, so-called linguistic spherical fuzzy set (LSFS), combining the …

Various linguistic expressions have been presented to model the flexibility of linguistic
preference expressions and to support the consensus reaching in linguistic group decision …

The present research deals with selected multi-criteria methods identified according to
available literature sources as a suitable instrument for the comprehensive evaluation of a …

The double hierarchy linguistic term set is a linguistic technique to elaborately and
accurately represent complex linguistic information for qualitative decision-making …

As a generalization to hesitant fuzzy linguistic term set (HFLTS), double hierarchy hesitant
fuzzy linguistic term set (DHHFLTS) is presented which circumvents the weakness of HFLTS …

With the continuous development of the economy and society, decision‐making problems
and decision‐making scenarios have become more complex. The q‐rung orthopair fuzzy set …

Many different types of ranking methods based on the score and accuracy functions of
intuitionistic fuzzy values (IFVs) exist in the literature. The notion of knowledge bases, as in …