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A critical dimension of the service quality of a call center is the wait time for a caller to get to a customer service representative. Periodically, random samples of three customer calls are measured with respect to these wait times. The results of the last four such samples are provided below. Suppose that the process has been determined to be within statistical control. If the specifications for wait time are 500 ± 18 seconds, is the process capable of meeting the specifications? Justify your answer. Assume that three-sigma performance is desired; thus, the target capability measure is 1.0. Please, show excel formulas.

Sample	Time 1	Time 2	Time 3	Mean	Range
1	495	501	499	498	6
2	514	510	504	509	10
3	505	498	509	504	11
4	496	507	492	498.3333	15
			Average	502.5	10.5