Jobs arrive randomly at a particular assembly plant: assume that the arrival rate is five jobs per hour. Service times (in minutes per job) do not follow the exponential probability distribution. Two proposed designs for the plant’s assembly operation are shown.     Service Times Design Mean Standard Deviation A 6.0 3.0 B 6.25 0.6   Use the M/G/1 model to compute the operating characteristics for each design. Which design provides the best operating characteristics? Why?

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