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On a bi-dimensional dynamic alternative routing method
Martins, Lúcia; Craveirinha, José; Clímaco, João N.; Gomes, TeresaThe analysis of a bi-dimensional dynamic routing model for alternative routing telecommunication networks led to the identification of an instability problem in the synchronous path selection associated with the complex interdependencies among the coefficients of the objective functions and the computed paths for every node pair. In this paper an analytical model enabling to make explicit this problem and evalu...
Dealing with imprecise information in group multicriteria decisions: a methodol...
Dias, Luís C.; Clímaco, João N.This paper outlines a distributed GDSS suitable to be used over the Internet, based on the VIP Analysis methodology and software. VIP Analysis incorporates complementary approaches to deal with the aggregation of multicriteria performances by means of an additive value function under imprecise information. This proposed GDSS intends to support a decision panel forming a democratic decision unit, whose members w...
Shortest path problems with partial information: Models and algorithms for dete...
Dias, Luís C.; Clímaco, João N.In this work we focus on partial information models for the well-known shortest path problem, where we consider multiple instances of values for the parameters that determine the cost of each arc. This allows coping with the uncertainty about the future, the imprecision of data, the arbitrariness of some options, the evolving values of the decision makers (DMs) and/or the multiplicity of DMs (in group decision ...
On computing ELECTRE's credibility indices under partial information
Dias, Luís C.; Clímaco, João N.The ELECTRE family of decision aid methods is a well-known approach to help decision makers (DMs) advance in a decision process. Among the most recent methods in the family, ELECTRE IS, III, and TRI compute fuzzy indices for the credibility of a given action outranking some other. We consider the case when the DMs are unsure which values each parameter should take, which may result from insufficient, imprecise ...
Planning the evolution to broadband access networks: A multicriteria approach
Antunes, Carlos Henggeler; Craveirinha, José F.; Clímaco, João N.The interplay between continuing technical innovations, development of multifaceted modes of communication and market structure, among other factors, have raised new and complex problems concerning the strategic modernisation planning of telecommunications networks, namely regarding the evolution paths towards a wide range of new service offerings to be delivered to homes by using broadband technologies. Howeve...
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