1.1 Background and Purpose

The key processes of decision making include the evaluation and selection of people. Related theoretical methods are based on the subject’s cognitive activities, which reflect a speculative analysis and treatment process. Therefore, decision making often depends on decision makers’ subjective preferences; common preference structures are judgment matrix, utility value, preference ordering value, linguistic value, and so on. Because of the uncertainty of the decision-making environment, decision makers tend to express in the form of preference, such as interval numbers, fuzzy numbers, and linguistic variables. This book studies mainly group decision-making methods and group aggregation methods based on ...

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