Abstract

AbstractThis chapter introduces a typical decision-making problem concerning the aggregation of rankings formulated by multiple experts. These rankings, which are inherently subjective and concern a specific attribute of a set of objects of interest, must be aggregated into a collective judgment, which is supposed to reflect the opinion of all experts.After presenting an introductory case study, this chapter shows that the problem of interest had been debated for over two centuries in several fields, such as Social Choice, Voting Theory, Economics, and Psychometrics. Nevertheless, the problem can also be extended to other less common fields, as long as they include multi-expert decisions. One of these fields is Engineering, which includes multiple decision-making activities in a variety of phases, such as Conceptual/Customer-Driven Design, Reliability Engineering, Manufacturing, and Quality Control.

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