Journal
INFORMATION SCIENCES
Volume 298, Issue -, Pages 555-567Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2014.11.027
Keywords
Consistency matrices; Group consensus degrees; Group decision making; Group recommendations; Interval fuzzy preference relations
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Funding
- National Science Council, Republic of China [NSC 101-2221-E-011-171-MY2]
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In this paper, we present a new method for group decision making using group recommendations based on interval fuzzy preference relations and consistency matrices. First, the proposed method constructs the collective consistency matrix, the weighted collective preference relation, and the group collective preference relation. Then, it constructs a consensus relation for each expert and calculates the group consensus degree of all experts. If the group consensus degree is smaller than a predefined threshold value, then it marks the consensus values in each consensus relation which are smaller than the group consensus degree and modifies the interval fuzzy preference values corresponding to the marked consensus values. The above process is performed repeatedly, until the group consensus degree is larger than or equal to the predefined threshold value. Finally, based on the group collective preference relation, it calculates the score of each alternative for ranking the preference order of the alternatives. The proposed method can overcome the drawbacks of the existing methods for group decision making. It provides us with a useful way for group decision making using group recommendations based on interval fuzzy preference relations and consistency matrices. (C) 2014 Elsevier Inc. All rights reserved.
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