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A two-stage dynamic group decision making method for processing ordinal information

Zhang,F, Ignatius,J, Lim,CP and Goh,M 2014, A two-stage dynamic group decision making method for processing ordinal information, Knowledge-Based Systems, vol. 70, pp. 189-202, doi: 10.1016/j.knosys.2014.06.025.

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Title A two-stage dynamic group decision making method for processing ordinal information
Author(s) Zhang,FORCID iD for Zhang,F orcid.org/0000-0001-9017-9646
Ignatius,J
Lim,CPORCID iD for Lim,CP orcid.org/0000-0003-4191-9083
Goh,M
Journal name Knowledge-Based Systems
Volume number 70
Start page 189
End page 202
Total pages 14
Publisher Elsevier
Place of publication Amsterdam , Netherlands
Publication date 2014-11-01
ISSN 0950-7051
Keyword(s) Dominance-based rough set approach
Group decision making
Ordinal preference
Power Average operator
Support function
Summary In group decision making (GDM) problems, ordinal data provide a convenient way of articulating preferences from decision makers (DMs). A number of GDM models have been proposed to aggregate such kind of preferences in the literature. However, most of the GDM models that handle ordinal preferences suffer from two drawbacks: (1) it is difficult for the GDM models to manage conflicting opinions, especially with a large number of DMs; and (2) the relationships between the preferences provided by the DMs are neglected, and all DMs are assumed to be of equal importance, therefore causing the aggregated collective preference not an ideal representative of the group's decision. In order to overcome these problems, a two-stage dynamic group decision making method for aggregating ordinal preferences is proposed in this paper. The method consists of two main processes: (i) a data cleansing process, which aims to reduce the influence of conflicting opinions pertaining to the collective decision prior to the aggregation process; as such an effective solution for undertaking large-scale GDM problems is formulated; and (ii) a support degree oriented consensus-reaching process, where the collective preference is aggregated by using the Power Average (PA) operator; as such, the relationships of the arguments being aggregated are taken into consideration (i.e., allowing the values being aggregated to support each other). A new support function for the PA operator to deal with ordinal information is defined based on the dominance-based rough set approach. The proposed GDM model is compared with the models presented by Herrera-Viedma et al. An application related to controlling the degradation of the hydrographic basin of a river in Brazil is evaluated. The results demonstrate the usefulness of the proposed method in handling GDM problems with ordinal information.
Language eng
DOI 10.1016/j.knosys.2014.06.025
Field of Research 080108 Neural, Evolutionary and Fuzzy Computation
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070154

Document type: Journal Article
Collection: Centre for Intelligent Systems Research
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