This study uses grey relational analysis, which is very flexible and ease of use to deal with decision-making problems, to prioritize the business reputation of the seven companies in information service industries with different parameters and weights settings. Though using different parameters and weights could generate different priority, the study has revealed that IBM in Taiwan and Motorola, Inc. in Taiwan were the two best companies in information service industries, whereas the other five companies still have room for improvement. More importantly, the gap in business reputation among the other four or five companies might not be significant.
