Suppose you are planning to use single sourcing and have narrowed down the choices to four suppliers A, B, C and D. Your criteria for selection are price (min), company size in market capitalization in millions of dollars (max), and quality on a scale of 1 to 100 (max). The relevant data are given in Table 5.42.

a. Scale the data using the Ideal value method.

b. Use the L∞ metric method to rank the four suppliers.

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TABLE 5.42 Supplier Data for Exercise 5.17 A BCD Price ($) (Min) 180,000 160,000 140,000 190,000 Size (Millions of Dollars) (Max) 2800 3200 2600 3600 Quality (Max) 75 85 80 65