Interactive group decision-making procedure using weak strength of preference

Abstract

In the paper, we present an interactive decision procedure for aggregating group members’ preferences which are specified in incomplete ways. A group consensus under incomplete information is not usually reached at a single step since less-specific preferences on attribute weights and performance scores make a clear selection of best alternative more difficult. To circumvent these difficulties, a measure, indicating the strength of preference between alternatives, is derived to help each of decision makers change his/her preference structure. To make preference changes based on the measure effective, we present a solution method to convert an intractable nonlinear programme into a linear one.

Keywords:

• decision analysis
• group decision making
• weak strength of preference

Acknowledgements

This work (CH Han) was supported by the research fund of Hanyang University (HY-2003-G) and Prof. BS Ahn was financially supported by Hansung University in the year 2005.