Given the decision table for determining the best supplier as follows:

Criteria	Weight	Suppliers
		Supplier 1	Supplier 2	Supplier 3	Supplier 4
		Score	Score	Score	Score
Quality	0.460	0.563	0.087	0.053	0.297
Price	0.274	0.303	0.078	0.573	0.046
Service	0.137	0.050	0.140	0.214	0.597
Delivery	0.129	0.638	0.060	0.151	0.151

1. How do you rank the suppliers based on the given criteria? Whos the best supplier?
2. If you are using AHP to solve the problem, how do you structure the problem? Draw the decision hierarchy.
3. Based on the decision hierarchy in (b), how many pairwise comparisons you need to perform?