One goal of JIT partnerships is the removal of in-plant inventory by delivery in small
lots directly to the using department as needed.
When using the stepping-stone method, the improvement index for an unused cell
equals the shipping cost associated with that cell.
An improvement in quality must necessarily increase costs.
Improvements in security, especially regarding the millions of shipping containers that
enter the U.S. each year, are being held back by the lack of technological advances.
One requirement of a linear programming problem is that the objective function must
be expressed as a linear equation.
Simulation models and expert systems are useful tools for enhancing maintenance.
Employee empowerment is unnecessary in the Toyota Production System, because
automation and powerful information systems reduce the need for employee creativity
and decision making.
An M/M/1 model and an M/D/1 model each have an arrival rate of 1 per minute and a
service rate of 3 per minute; the average queue length of the M/M/1 will be twice that
of the M/D/1.
The Japanese use the term “poka-yoke” to refer to continuous improvement.
A lot that is accepted by acceptance sampling is certified to be free of defects.
Given the following bill of material
If the demand for product A is 30 units, and there are 10 units of B on hand and none of
C, how many units of part D will be needed?
A) 3
B) 40
C) 70
D) 90
E) 110
What is sometimes referred to as rated capacity?
A) efficiency
B) utilization
C) effective capacity
D) expected output
E) design capacity
Which one of the following statements about maintenance is true?
A) The optimal degree of preventive maintenance is associated with zero breakdowns.
B) Breakdown maintenance is proactive.
C) Preventive maintenance is reactive.
D) Preventive maintenance is limited to keeping machinery and equipment running.
E) Human resources are a major component of effective maintenance management.
Students arrive randomly at the help desk of the computer lab. There is only one service
agent, and the time required for inquiry varies from student to student. Arrival rates
have been found to follow the Poisson distribution, and the service times follow the
negative exponential distribution. The average arrival rate is 12 students per hour, and
the average service rate is 20 students per hour. How many students, on the average,
will be waiting in line at any one time?
A) 0.9 students
B) 1.5 students
C) 3 students
D) 4 students
E) 36 students
If 1 million passengers pass through the St. Louis Airport with checked baggage each
month, a successful Six Sigma program for baggage handling would result in how
many passengers with misplaced luggage?
A) 3.4
B) 6.0
C) 34
D) 2700
E) 6 times the monthly standard deviation of passengers
Develop a solution for the following line balancing problem, allowing a cycle time of 5
minutes.
a. Draw the precedence diagram for the set of tasks.
b. Calculate the theoretical minimum number of workstations.
c. Balance this line using the longest task time heuristic.
d. What tasks are assigned to which stations?
e. Does the solution have the minimum number of stations? Explain.
f. How much idle time is there, summed over all workstations?
g. What is the efficiency of this line?
Which of the following statements regarding finite capacity scheduling (FCS) is false?
A) Finite capacity scheduling is well suited for dynamic scheduling environments.
B) Finite capacity scheduling overcomes the disadvantages of systems based
exclusively on rules.
C) Finite capacity scheduling is very powerful, but does not allow for rapid changes.
D) Finite capacity scheduling often gets its data from the output of an MRP system.
E) None; all of the above are true.
From a portion of a probability distribution, you read that P(demand = 0) is 0.05 and
P(demand = 1) is 0.10. The cumulative probability for demand 1 would be
A) 0.05
B) 0.075
C) 0.10
D) 0.15
E) cannot be determined
MTBF measures the average
A) calendar time between failures
B) operating time between failures
C) number of failures per unit time
D) number of operations between failures
E) downtime per breakdown
Ten high-technology batteries are tested for 200 hours each. One failed at 50 hours; all
others completed the test. FR(%) is __________ and FR(N) is __________.
A) 10%; 1/1850
B) 10%; 1/2000
C) 25%; 1850 hours
D) 90%; 1/2000
E) Indeterminate; no standard deviation is given.
Which of the following is least likely to be a Cost Leadership competitive advantage?
A) low overhead
B) effective capacity use
C) inventory management
D) broad product line
E) mass production
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) normal
C) Poisson
D) exponential
E) lognormal
An organization whose capacity is on that portion of the average unit cost curve that
falls as output rises
A) has a facility that is below optimum operating level and should build a larger facility
B) has a facility that is above optimum operating level and should build a smaller
facility
C) is suffering from diseconomies of scale
D) has utilization higher than efficiency
E) has efficiency higher than utilization
“Time compression” and the ability to pose “what-if” questions are elements of
A) setting up a probability distribution for important variables
B) the disadvantages of simulation
C) physical simulations but not mathematical simulations
D) the advantages of simulation
E) the broad threefold idea of simulation
A job shop is an example of a(n)
A) repetitive process
B) continuous process
C) line process
D) intermittent process
E) specialized process
In repetitive manufacturing, what are the advantages of level material use? Does level
material use have any role in intermittent process facilities?
What are the advantages of work sampling over time-study methods?
Service location strategies and goods-producing location strategies rely on very
different sets of assumptions. What are the assumptions associated with
goods-producing locations? How do these assumptions lead to a location strategy?
A small manufacturer that offers “hand crafted” furniture has developed a new style of
desk that they believe will be very successful in the marketplace. It is expected that the
first desk will take about 60 hours of craftsmen’s time to complete. They expect a 90%
learning curve for this desk.
How long will it take to make the 20th desk? The firm is considering accepting an order
for 25 desks. How many hours of labor will this require for all 25?
What is the difference between a Gantt load chart and a Gantt scheduling chart?
Suppose a manufacturing plant is considering three options for expansion. The first one
is to expand into a new plant (large) , the second to add on third-shift to the daily
schedule (medium) , and the third to do nothing (small) . There are three possibilities
for demand. These are high, medium, and low with each having an equal likelihood of
occurring. Suppose that the profits for the expansion plans are as follows (respective to
high, medium, low demand). The large expansion profits are $100000, $10000,
-$10000, the medium expansion choice $40000, $40000, $5000 and the small
expansion choice $15000, $15000, $15000. Calculate the EMV of each choice. Which
of the expansion plans should the manager choose?
Bratt’s Bed and Breakfast, in a small historic New England town, must decide how to
subdivide (remodel) the large old home that will become their inn. There are three
alternatives: Option A would modernize all baths and combine rooms, leaving the inn
with four suites, each suitable for two to four adults. Option B would modernize only
the second floor; the results would be six suites, four for two to four adults, and two for
two adults only. Option C (the status quo option) leaves all walls intact. In this case,
there are eight rooms available, but only two are suitable for four adults, and four rooms
will not have private baths. Below are the details of profit and demand patterns that will
accompany each option. Which option has the highest expected value?
__________ showed that there is a dynamic social system in the workplace.
In goods-producing organizations, __________,__________, and __________ may be
inventoried.