Steps of the L2 Metric Method

Step 1 Determine the ideal solution. The ideal values for the 14 criteria in Table 2.7 are given in Table 2.13. 

Step 2 Use the L2 metric to measure the closeness of each supplier to the ideal values. The L2 metric for supplier k is given by 

Step 3 Rank the suppliers using the L2 metric. The supplier with the smallest L2 value is ranked first, followed by the next smallest L2 value, and so on. Table 2.14 gives the L2 distance from the ideal for each supplier and the resultant rankings from 1 to 20. 

Supplier Ranking Using L2 Metric (Case Study 1) 

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