Multi-Criteria Ranking Methods

Weighted methods are commonly used to rank the alternatives under conflicting criteria. Based on the DM s preferences, a weight Wj is obtained for criterion such that 

a weighted score of the criteria values is calculated for each alternative as follows  

The alternatives are then ranked based on their scores. The alternative with the highest score is ranked at the top. 

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In this chapter, we discuss supplier selection models and the multiple conflicting criteria used in supplier selection. Multi-criteria ranking methods for the prequalification of suppliers are discussed in detail. Next, multi-criteria optimization models are presented to determine the optimal order alloca-hon among the shortlisted suppliers. Several variants of goal programming methods for solving multiple criteria mathematical programming models are presented with a case study. 

Multi-Criteria Ranking Methods for Supplier Selection... 

For a more detailed discussion of multi-criteria ranking methods, the reader is referred to Masud and Ravindran (2008,2009). 

When tackling a multi-objective problem by GAs, various approaches to fitness definition may be adopted Fonseca (1995). In what follows we will resort to the so called Pareto-based methods Goldberg (1989) once a population of chromosomes has been created, these are ranked according to the Pareto dominance criterion by looking at the /-dimensional space of the fitnessesfi U), i = Firstly,... 

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