In this paper, a class of single-allocation hub location problems is investigated from the
perspective of upgrading. The latter is understood as an improvement of a set of edges to …

This paper introduces a new hierarchical facility location model with three levels: first-level
facilities which manufacture different products, second-level facilities which act as …

In this paper, different upgrading strategies are investigated in the context of the p-center
problem. The possibility of upgrading a set of connections to different centers is considered …

In this paper, we deal with some variants of classical facility location problems on graphs in
which both the customers and the facilities belong to a non-necessarily convex …

In this paper we present a generalization of the Graphical Traveling Salesman Problem
(GTSP). Given a communication graph in which not all direct connections are necessarily …

In this paper, we analyse the upgrading of arcs in the p-median problem on a bi-network.
Both travel times and transportation costs are associated with each arc. Our goal consists of …

Water shortage has become a significant challenge in many regions, affecting sectors such
as agriculture, energy, industry, and the economy. Based on this subject matter and …

We tackle the downgrading maximal covering location problem within a network. In this
problem, two actors with conflicting objectives are involved:(a) The location planner aims to …

Enhancing urban emergency capacity requires a comprehensive evaluation of
preparedness to identify vulnerable areas and propose mitigation strategies. Traditional …

Covering problems are well-studied in the domain of Operations Research, and, more
specifically, in Location Science. When the location space is a network, the most frequent …