we present a model and propose an approach to compute an approximate solution of fully fuzzy linear system $(ffls)$ of equations in which all the components of the coefficient matrix are either nonnegative or nonpositive. first, in discussing an $ffls$ with a nonnegative coefficient matrix, we consider an equivalent $ffls$ by using an appropriate permutation to simplify fuzzy multiplications. t...

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...

In the context of logistics and transportation, this paper discusses how simheuristics can be extended by adding a fuzzy layer that allows us to deal with complex optimization problems both stochastic uncertainty. This hybrid approach combines simulation, metaheuristics, logic generate near-optimal solutions large scale NP-hard typically arise in many transportation activities, including vehicl...

The transportation problems are primarily concerned with the optimal way in which products produced at different plants (supply origins) are transported to a number of warehouses or customers (demand destinations). The objective in a transportation problem is to fully satisfy the destination requirements within the operating production capacity constraints at the minimum possible cost. The obje...

This paper proposes a new approach to solve the trapezoidal fuzzy unbalanced transportation problem. The proposed method is very efficient in terms of computation. The algorithm of this approach is presented, and explained briefly. Finally, a numerical example is described in the paper to show its efficiency.