Quiz 6

Ideally in waiting line or queuing analysis we want to balance the cost of service capacity with the cost of waiting. a. False b. True

True

A waiting line, or queue is formed due to the variability of... a. queue discipline b. population c. arrival rates and service rates d. number of channels

arrival rates and service rates

The sign at the bank that reads "Wait here for the first available teller" suggests the use of a ________ waiting line system. a. single channel b. multi-channel c. single phase d. multiple line e. multi-phase

multi-channel

A bank, with several clerks for one line of customers, is an example of a a. single channel, single phase system b. none of the above c. multi-channel, multi-phase system d. single channel, multi-phase system e. multi-channel, single phase system

multi-channel, single phase system

A waiting line model 1 has an arrival rate of 2 per hour and a service rate of 6 per hour; the utilization for the system is approximately A) 0,50 B) 0,67 C) 0,25 D) 0,33 E) 3,00

0,33 (6/2=0,33)

A waiting line model 1 has an arrival rate of 2 per hour and a service rate of 8 per hour; the utilization factor for the system is approximately (ρ=λ÷μ) Select one: a.0.67 b.0.33 c.0.50 d.3.00 e.0.25

0.25

The shopper who says to himself, "I've waited too long in this line. I don't really need to buy this product today," and leaves the store is an illustration of which element of arrival behavior? a. Random arrival b. Renege c. Balk d. none of the above e. Random departure

Renege

A waiting line, or queuing, system has three parts, which are A) Sequencing policy, penalty for reneging, and expediting of arrivals B) Arrival rate, service rate, and utilization rate C) Arrival discipline, queue discipline, and service sequencing D) Arrival or inputs, queue discipline or the waiting line itself, and the service facility E) Distribution of arrival times, discipline while waiting, and distribution of service time

Arrival or inputs, queue discipline or the waiting line itself, and the service facility

Which one of the following is NOT a characteristic of waiting model 1? a. Single number of phases b. Single number of channels c. Exponential service time pattern d. Poisson arrival rate pattern e. Constant service time

Constant service time

The source population is considered to be either ______ in its size. A) Known or unknown B) Fixed or variable C) Random or scheduled D) Small or large E) Finite or infinite

Finite or infinite

The source population in model 2 is considered to be .... a. Finite b. Unknown c. Infinite d. Variable e. Random

Infinite

Which one of the following is not a characteristic of waiting model 1? A) Single number of channels B) Poisson arrival rate pattern C) Limited population size D) Single number of phases E) Exponential service time pattern

Limited population size

An airline ticket counter, with several agents for one line of customers, is an example of a A) Single channel, single phase system B) None of the above C) Multi-channel, multi-phase system D) Single channel, multi-phase system E) Multi-channel, single phase system

Multi-channel, single phase system

In queuing problems, which of the following probability distributions is typically used to describe the number of arrivals per unit of time? A) Binomial B) Exponential C) Poisson D) Lognormal E) Normal

Poisson

"Women and children first!" declares the captain of a sinking ship. His directive employs which of the following queue disciplines in disembarking passengers? a. Random b. FIFO (First In First Out) c. Priority d. LIFO (Last In First Out) e. none of the above

Priority

Waiting for a service to begin is called... a. Impacient behaviour b. Queueing c. Reneging d. Balking

Queueing