A queuing system for blood draws.
An average of 25 patients arrive for a blood draw each hour.
One full-time (very experienced) lab person can take one patient every two minutes, thus 30 draws per hour can be done.
What can we find out about this environment? Do the queuing analysis and find out: mean service rate, mean arrival rate, utilization of the queue, mean waiting time, mean number of customers in the queue.

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Mean arrival rate λ= 25/60’= 5/12’=5/(12*60)sec=1/144 persons/sec
Mean service rate μ=1/2’=30/60’=1/120 persons/sec...

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