Jobs arrive randomly at a particular assembly plant; assume that the given arrival rates in the table below has a Poisson distribution and service times (in minutes per job) do not follow the exponential probability distribution. Foul proposed designs for the plant's assembly operation are shown: DESIGN A DESIGN B DESIGN C DESIGN D Service time (in minutes per job) Arrival rate (jobs per hour) Mean Standard deviation 5 4 4 5 3 6 2 7 3 4 2 0 Compute the average time in the assembly plant for each design and decide which design provides the best performance?

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