Consistency and consensus reaching process for group decision making based on complete interval distributed preference relations under social network analysis

Mi Zhou, Zhong-Xu Guan, Yu-Wang Chen (Corresponding), Zhi-Ping Zhou, Jian Wu, Enrique Herrera-Viedma

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Abstract

Group decision-making (GDM) problems often consist of many indeterminacy factors in realistic situation. How to cope with consistency and consensus under uncertain circumstance are two critical issues in pairwise comparison based GDM problems. In this paper, we firstly propose the model of complete interval distributed preference relation (CIDPR) based on the concept of linguistic distribution with interval symbolic proportions, distribution linguistic preference relation (DLPR) and IDPR. Secondly, the additive consistency index of CIDPR is defined to measure the consistency level of expert’s judgment, and an adjustment algorithm is proposed for converting inconsistent CIDPR to an acceptable consistent level. Thirdly, since trust relation is a critical factor in the generation of experts’ weights and the adjustment of experts’ opinions, consensus reaching process (CRP) is designed to take into account distributed linguistic trust relations under social network analysis (SNA). In the proposed adjustment mechanism, non-consensus individual should modify opinion towards his/her trusted and highly weighted expert. The advantage of the proposed inconsistent CIDPR adjustment model can maximally retain the information in the original distribution, while the CRP has a relatively fast convergent speed and good practicality. An illustrative example of strategic new product selection is conducted to demonstrate the applicability of the proposed method and its potential in supporting realistic GDM problems.
Original languageEnglish
Pages (from-to)126-145
Number of pages20
JournalInformation Fusion
Volume88
Early online date23 Jul 2022
DOIs
Publication statusPublished - 1 Dec 2022

Keywords

  • Complete interval distributed preference relation
  • Consensus reaching process
  • Consistency
  • Distributed linguistic trust relation
  • Group decision making
  • Opinion fusion

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