A study on consensus-reaching process using intuitionistic fuzzy similarity

• Main Authors: Hsiu Yu Chang, 張修毓
• Other Authors: J. C. Wang
• Format: Others
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/58304858306469129870

碩士 === 長庚大學 === 資訊管理學研究所 === 97 === There are many decisions to make in our daily lives. When facing some problems, group decision is often more reliable than individual decision. More over, the consensus-reaching process is considered the most important process in all group decision methods. Implementing intuitionistic fuzzy similarities into such process can lower the degree of hesitation during group decision. In this research, we proceeded a simulation experiment in the consensus-reaching process with intuitionistic fuzzy similarity. The simulation data included different sizes of decision matrices in different number of alternatives, attributes, and experts. Then we compare each similarity measure arranged by previous researchers according to the ranking results. Finally, we discussed the result of alternative ranking influenced by all kinds of intuitionistic fuzzy similarities. According to our experiment analysis, when few experts participate, most of the intuitionistic fuzzy similarities resulted in similar ranking during the consensus-reaching process. Nevertheless, the rankings diversed as the number of experts increased from 3 to 12, and the Spearman correlation coefficient finally resulted in -0.5. As a result, when carrying out consensus-reaching process with intuitionistic fuzzy similarity in group decision, we should be cautious with the similarity measures according to the number of experts participated in decisions.