Exam 10: Waiting Line Analysis and Simulation

What is the mean of the exponential distribution?

In a department 25 machines are kept running by three operators who respond to randomly occurring equipment problems. An analyst who wanted to know how much production was being lost by machines waiting for service could use queuing theory analysis to find out.

In a department 25 machines are kept running by three operators who respond to randomly occurring equipment problems. When an operator is not immediately available for servicing a machine having a problem, the amount of production being lost by machines waiting for service increases. An analyst can use queuing theory analysis to determine whether to pay overtime to get an operator from a different shift or not.

Customers arrive at a common queue at the coffee station with two identical coffee machines in a busy mall at the rate of 48 per hour, following Poisson distribution. Each customer mixes his or her specialty coffee taking 2 minutes on an average following an exponential process. What is the expected number of customers in the system at this coffee station?

Assuming a 24 hour operation in a warehouse, and an arrival following Poisson distribution with mean rate of 36 per day and service (unloading using a single bay) following exponential distribution with a rate of 48 trucks per day, answer the following question. What is the expected waiting time in the system (in hours) for a typical truck?

Machine breakdown and repair in a 12-machine factory having three repair mechanics would develop which type of queuing system line structure concerning machine breakdowns?

In modeling a simulation, random numbers from 00 to 99 are assigned with the intervals determined from frequency distributions for each behavior occurrence. Assume there are two behaviors, A and B, out of 100 tallies. On Behavior A you record 45 tallies, and on Behavior B you record 55 tallies. Which of the following is a correct random-number interval for Behavior A?

In a practical sense, an infinite queue is one that includes every possible member of the served population.

In a college registration process, several department heads have to approve an individual student's semester course load. What is the queuing system line structure?

Which of the following is not a suggestion for managing queues presented in the textbook?

A company is concerned about the number of customers who have to wait for service in its customer service department. Assume the rate at which customers are serviced is 12 per hour. Using the infinite queuing notion for the models presented in the textbook, which of the following is the mean time between arrivals?

The demand on a hospital's emergency medical services is considered an uncontrollable arrival pattern of the calling population.

A roller-coaster ride in an amusement park employs which type of queuing system line structure?

Which of the following are the three major components of a queuing system?

The admissions system in a hospital for patients is an example of a single-channel, single-phase queuing system.

The spreadsheet function RAND() returns a number between negative and positive one.

Arrival patterns can be influenced or even controlled to a certain degree.

Standing in line to buy a ticket for a movie where there are multiple windows at which to buy tickets is which type of queuing system line structure?

Highest-profit customer first is a queue discipline discussed in the textbook.

In a department, 25 machines are kept running by three operators who respond to randomly occurring equipment problems. An analyst wanting to know whether to add a fourth operator or downsize to two operators would be helped by using queuing theory analysis.