Nova QNT 5160 Quiz 4 2018
Nova QNT 5160 Quiz 4 2018
<pclass=”msonormal”>QUESTION 1
The goal of the basic EOQ model is to:
minimize
the sum of setup and holding costs.
minimize
the sum of purchasing and setup costs.
minimize
order size.
minimize
order cost.
minimize
holding cost.
QUESTION 2
As the ratio of arrival rate to service rate is increased,
which of the following is likely?
The
average wait time decreases.
Utilization
is decreased because of the added strain on the system.
The
average number in the system decreases.
Customers
move through the system in less time because utilization is increased.
None
of the above.
QUESTION 3
The Anderson Palmer Hospital would like to reduce the cost
of its inventory by calculating the optimal order size for hypodermic needles. On
average, the hospital uses 100 needles per month. The purchasing staff has
calculated that the EOQ for needles is 135 needles. If they proceed to purchase
in EOQ quantities, how many orders per year will be placed?
About
6 orders per year
About
7 orders per year
About
9 orders per year
About
10 orders per year
QUESTION 4
The term queue discipline refers to:
the
willingness of customers to wait in line for service.
having
multiple waiting lines without customers switching from line to line.
the
order in which customers are processed.
the
reason waiting occurs in underutilized systems.
None
of the above.
QUESTION 5
A single-server queueing system has an average service time
of 16 minutes per customer, which is exponentially distributed. The manager is
thinking of converting to a system with a constant service time of 16 minutes.
The arrival rate will remain the same. The effect will be to:
increase
the utilization factor.
decrease
the utilization factor.
increase
the average waiting time.
decrease
the average waiting time.
not
have any effect since the service time is unchanged.
QUESTION 6
The Anderson Palmer Hospital would like to reduce the cost
of its inventory by calculating the optimal order size for hypodermic needles.
On average, the hospital uses 100 needles per month, the cost of placing an
order is $15, and holding cost is estimated to be $1.20 per needle per year.
Using the EOQ formula, the optimal order size is:
about
50 needles.
about
80 needles.
about
130 needles.
about
170 needles.
QUESTION 7
Which of the following is not considered a holding cost?
Cost
of goods sold
Opportunity
cost
Interest
Insurance
Depreciation
QUESTION 8
A single bay car wash with an exponential arrival rate and
service time has cars arriving an average of 10 minutes apart, and an average
service time of 2 minutes. The utilization factor is:
0.20
0.67
2.50
5.00
None
of the above
QUESTION 9
Which of the following is not generally considered as a
measure of performance in queueing analysis?
The
cost of servers plus customer waiting cost
The
average number waiting in line
The
average number in the system
The
number of server positions
The
system utilization factor
QUESTION 10
If a manager decreases the system utilization standard
(assuming no change in the customer arrival rate) what happens to the customer
waiting time?
It
increases exponentially.
It
increases proportionally.
It
decreases proportionally.
It
decreases exponentially.
It
does not change.
QUESTION 11
During the early morning hours, customers arrive at a branch
post office at the average rate of 30 per hour (exponential interarrival
times), while clerks can handle transactions on an average of 3 minutes each
(exponential). What is the minimum number of clerks needed to keep the average
time in the system under 5 minutes?
2
3
4
5
6
…
QUESTION 12
A small convenience store normally has one employee
attending to the cash register. The average time between customer arrivals at
the store is 4 minutes. The average service time at the cash register is 2
minutes. If more than two customers are standing at the register (including the
customer being served), management has observed that other customers sometimes
become upset and leave the store. What percentage of the time will this problem
will occur?
about
12%
about 24%
about
36%
about
50%
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