Browsing by Author "Chang, WCW"

Now showing 1 - 2 of 2

Analyzing ordinal data for group representation
(2000-01-01)
Chang, WCW
;
Chu, PY
;
Ding, CG
;
Wu, SS
;
經營管理研究所
With n individuals ranking m objects, the exhaustive comparison approach, proposed in this paper, produces a list of order vectors sorted by the relative number of concordant pairs. The exhaustive comparison approach compares all possible order vectors instead of "an" optimal order vector to help the data analyst to consider "practical" solutions rather than a "desired" solution. An overall concordant order ratio is proposed to measure "how well" each order vector may represent the ranking structure of an ordinal data set. And the marginal concordant ratio evaluating the goodness of fit of each object in each order vector is also proposed in this paper. Comparisons among some popular ranking methods are discussed in this article. An empirical survey data regarding how travelers considered various factors for choosing travelling locations are used to illustrate the proposed method and calculations.
Multiple comparisons of ranking vectors
(1998)
Chu, PY
;
Wu, SS
;
Ding, CG
;
Chang, WCW
;
管理科學系
Many managerial studies have indicated that the relative importance of the appealing of working factors far the working environment is perceived differently by different working classes. Different parties may rank the same working factors in different sequences according to their perceived importance. How do we establish a ranking vector of the attractive working factors for a set of employees? How do we compare the ranking vectors from different sets of employees? These issues need to be effectively handled to improve management quality. The concept of multiple comparisons of ranking vectors can be applied in many managerial applications, such as selecting portfolios, designing training programs, positioning, peer-ranking, conducting performance appraisal and so on. This paper discusses the concept of multiple comparisons of ranking vectors, and proposed a method for implementation. An empirical survey data regarding expectation and perception of a training program in a firm is used for illustration.