To address uncertainty and hesitation of a real-life problem, interval-valued intuitionistic fuzzy sets (IVIFSs) have received increasing interest among researchers industrialists. In this paper, we present an advanced illustration IVIFSs using physical distancing during COVID-19 to understand the deep concept IVIFSs. Due special feature IVIFSs, it finds better decision problem having hesitatio...

A ship’s crew plays an important role in the maritime transportation sector and their performance is paramont in the shipping industry. On this account, an impartial evaluation of the crew’s performance is an important issue. In this paper, the ship officer’s performance evaluation problem is studied. The performance evaluation criteria that shipping companies take into account are determined a...

Maintaining and developing competitive advantages in a constantly changing market requires the creation and exploitation of a network of adequate competences. Competence management necessitates both clean formalisation and evaluation of the pertinence of competences. This depends on several factors and involves subjective elements. In this paper, a methodological approach for evaluating compete...

 In today’s highly competitive market, the pressure on organizations to find a better way to create and deliver value to customers is mounting. The decision involves many quantitative and qualitative factors that may be conflicting in nature. Here, we present a new model for transportation problem with consideration of quantitative and qualitative data. In the model, we quantify the qua...

In this paper it is assumed that there are two types of customer demands. Demands of the first type are discrete fuzzy random variables with a poison distribution and the second are continuous fuzzy random variables with a normal distribution. In this problem the distribution centers (DC)s, are selected and allocated in a way that not only the total transportation cost of the problem is minimiz...

The efficiency of transportation system management plays an important role in the planning and operation efficiency of flexible manufacturing systems. Automated Guided Vehicles (AGV) are part of diversified and advanced techniques in the field of material transportation which have many applications today and act as an intermediary between operating and storage equipment and are routed and contr...

Facility location-network design (FLND) problem, which determines the location of facilities and also communication links between the demand and facility nodes, is arisen from the combination of the facility location and network design problems. This paper deals with fuzzy capacitated facility location-network design model which aims to select the facilities and candidate links in a way that yi...