Question 36) Queuing theory had its beginning in the research work of _____

36) Queuing theory had its beginning in the research work of ________.

A) Albert Einstein

B) A.K. Erlang

C) J.K. Rowling

D) P.K. Poisson

E) A.K. Cox

37) Assume that we are using a waiting line model to analyze the number of service technicians required to maintain machines in a factory. Our goal should be to

A) maximize productivity of the technicians.

B) minimize the number of machines needing repair.

C) minimize the downtime for individual machines.

D) minimize the percent of idle time of the technicians.

E) minimize the total cost (cost of maintenance plus cost of downtime).

38) In queuing analysis, total expected cost is the sum of expected ________ plus expected ________.

A) service costs, arrival costs

B) facility costs, calling costs

C) calling cost, inventory costs

D) calling costs, waiting costs

E) service costs, waiting costs

39) In queuing theory, the calling population is another name for ________.

A) the queue size

B) the servers

C) the arrivals

D) the service rate

E) the market researchers

40) Which of the following is not a valid queuing model based on the Kendall notation?

A) M/M/3

B) D/D/2

C) D/M/1

D) M/M/0

E) G/D/1

41) Which of the following is not true about arrivals?

A) Random arrivals are independent of each other.

B) Random arrivals cannot be predicted exactly.

C) The Poisson distribution is often used to represent the arrival pattern.

D) Service times often follow the negative exponential distribution.

E) The exponential distribution is often used to represent the arrival pattern.

42) An arrival in a queue that reneges is one who

A) after joining the queue, becomes impatient and leaves.

B) refuses to join the queue because it is too long.

C) goes through the queue, but never returns.

D) jumps from one queue to another, trying to get through as quickly as possible.

E) None of the above

43) The customer who arrives at a bank, sees a long line, and leaves to return another time is

A) balking.

B) cropping.

C) reneging.

D) blithering.

E) None of the above

44) The three major characteristics of the input source that generates arrivals or customers for the service system are ________.

A) size, demographics, and behavior

B) size, pattern, and behavior

C) demographics, pattern, and behavior

D) size, demographics, and pattern

E) None of the above

45) The term queue “discipline” describes the

A) degree to which members of the queue renege.

B) sequence in which members of the queue arrived.

C) degree to which members of the queue are orderly and quiet.

D) sequence in which members of the queue are serviced.

E) All of the above

46) A vendor selling newspapers on a street corner is an example of a

A) single-channel, multiphase system.

B) single-channel, single-phase system.

C) multichannel, multiphase system.

D) multichannel, single-phase system.

E) None of the above

47) Lines at banks where customers wait for a teller window are usually representative of a

A) single-channel, multiphase system.

B) single-channel, single-phase system.

C) multichannel, multiphase system.

D) multichannel, single-phase system.

E) None of the above

48) Which of the following distributions is most often used to estimate the arrival pattern?

A) negative exponential

B) normal

C) Poisson

D) Erlang

E) beta

49) A single automatic car wash with one bay and a cycle time of 2.5 minutes is what type of model?

A) M/M/1

B) M/M/2

C) M/D/2

D) M/D/1

E) M/G/1

50) A single automatic car wash with one bay and a service time that is normally distributed is what type of model?

A) M/M/1

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