Melanie is the manager of the Clean Machine car wash

Jul 14th, 2016
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Sullivan University
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Melanie is the manager of the Clean Machine car wash and has gathered the following information. Customers arrive at a rate of 8 per hour according to a Poisson distribution. The car washer can service an average of 10 cars per hour with service times described by an exponential distribution. Melanie is concerned with the number of customers waiting in line. She has asked you to calculate the following system characteristics: (a) Average system utilization. (b) Average number of customers in the system. (c) Average number of customers waiting in line. Melanie realizes that how long the customer must wait is also very important. She is also concerned about customers balking when the waiting line is too long. Using the arrival and service rates in previous set of problems, she wants you to calculate the following system characteristics: (a) The average time a customer spends in the system. (b) The average time a customer spends waiting in line. (c) The probability of having more t

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Part 1Mean Arrival Rate, = 8 cars per hourMean Service Rate, = 10 cars per hour(a) Average system utilization, =8/10 = 0.8 or 80%(b) Average number of customers in the system = =8/108 = 4(c) Average number of customers waiting in line = =0.88/108 = 3.2Part 2(a) Average time a custome

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