A company must decide which optical scanner to purchase. Four suppliers are under consideration. The company€™s purchasing manager has collected the following information from the four suppliers.

Given this information and assuming that the purchasing manager will make her choice based on the supplier who has the highest system availability, which supplier should she select?

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er A Supplier B Supplier C Supplier D MTBF Chours) 183 MTTR (hours) 3 196 191 236