In queuing problems, the term “renege” refers to the fact that some customers leave the
queue before service is completed.
The arithmetic approach (or successive doubling approach) to learning curve
calculations allows us to determine the hours required for any unit.
Gantt charts are useful for scheduling jobs, but not for loading them.
In sensitivity analysis, a zero shadow price (or dual value) for a resource ordinarily
means that the resource has not been used up.
The product failure rate is the percentage of failures among the total number of
products tested.
Changes in capacity may lead, lag, or straddle the demand.
The economic part period is a fraction of a time bucket.
In location decisions, intangible costs are easier to measure than tangible costs.
Inventory has only one positive aspect, which is availability; inventory has several
negatives, including increased material handling, obsolescence, and damage.
The objective of layout strategy is to develop an effective and efficient layout that will
meet the firm’s competitive requirements.
Jars of pickles are sampled and weighed. Sample measures are plotted on control charts.
The ideal weight should be precisely 11 oz. Which type of chart(s) would you
recommend?
A) p-charts
B) c-charts
C) – and R-charts
D) -, but not R-charts
E) both p- and c-charts
Which of the following represents an unlimited queue?
A) drive-through lane at a fast-food restaurant
B) small barbershop with only 5 chairs for waiting customers
C) toll booth serving automobiles on an interstate
D) faculty office with limited seating during office hours
E) restaurant with no outside seating and limited capacity due to fire department
restrictions
A county wants to build one centrally-located processing facility to serve the county’s
four recycling drop-off locations. The four drop-offs have characteristics as given in the
table below. What is the approximate center of gravity of these four locations?
A) 4.75, 6.04
B) 17, 24
C) 33.5, 135.4
D) 6, 4.25
E) 570, 725
Which of the following will more likely locate near their customers?
A) an automobile manufacturer
B) an aluminum manufacturer
C) an insurance company headquarters
D) a medical clinic
E) All of the above will tend to locate near their customers.
In transportation model analysis the stepping-stone method is used to
A) obtain an initial optimum solution
B) obtain an initial feasible solution
C) evaluate empty cells for possible degeneracy
D) balance supply and demand
E) evaluate empty cells for potential solution improvements
An assembly line has 10 stations with process times of 1, 2, 3, 4, €¦, 10 respectively.
The process time of the system is
A) 18.18% of the process cycle time
B) 100% of the process cycle time
C) 550% of the process cycle time
D) 50% of the process cycle time
E) none of the above
Which of the following is an aid used to monitor jobs in process?
A) a Gantt load chart
B) the assignment method
C) a Gantt schedule chart
D) Johnson’s rule
E) none of the above
Which of the following is false regarding control charts?
A) Values above the upper control limits always imply that the product’s quality is
exceeding expectations.
B) Control charts are built so that new data can be quickly compared to past
performance data.
C) Control charts graphically present data.
D) Control charts plot data over time.
E) None of the above is false.
Which of the following best illustrates the importance of employee involvement in
achieving successful maintenance and reliability?
A) Operator, machine, and mechanic are independent of one another.
B) Small standard deviations tend to favor preventive maintenance over breakdown
maintenance.
C) Infant mortality in products can be decreased through improved owner’s manuals
and after-sales service and customer training.
D) Employee involvement through such elements as reward systems and power sharing
combine with good maintenance and reliability procedures to improve capacity and
reduce variability.
E) Empowered operators have higher competence at repairs than field service or depot
service.
Which of the following best describes a gross material requirements plan?
A) a schedule that shows total demand for an item, and when it must be ordered from a
supplier or when production must be started
B) an intermediate range plan for the scheduling of families of products
C) a chart illustrating whether capacity has been exceeded
D) a table that corrects scheduled quantities for inventory on hand
E) a schedule showing which products are to be manufactured and in what quantities
The purpose of the transportation approach for location analysis is to minimize
A) total costs
B) total variable costs
C) total fixed costs
D) total shipping costs
E) the number of shipments
The large parts of a playground A-frame (from which to hang a swing or glider) consist
of a ridge pole, four legs, and two side braces. Each pair of legs fastens to the ridge with
one fastener set. Each side brace requires two fastener sets for attachment to the legs.
Each fastener set includes one zinc-plated bolt, one lock-washer, and one nut.
There is one order outstanding, to make 80 frame kits. There are 200 legs in inventory.
There are no other large items in inventory, and no scheduled receipts. Fasteners are
available from the small parts area.
a. Draw the product structure tree
b. Calculate the net requirements to fulfill the outstanding order.
Eli Whitney, in the __________, provided the foundations for __________ in
operations management.
A) 1920s; statistical sampling
B) United Kingdom; mass production
C) U.S. Army; logistics
D) nineteenth century; interchangeable parts
E) none of the above
One of the disadvantages of simulation is that it
A) does not allow for very complex problem solutions
B) produces solutions and inferences that are not usually transferable to other problems
C) cannot study the interactive effects of individual components or variables
D) is very limited in the type of probability distribution that can be used
E) interferes with the production systems while the program is being run
Techniques for building employee empowerment include
A) building communication networks that include employees
B) developing open, supportive supervisors
C) moving responsibility from both managers and staff to production employees
D) building high-morale organizations
E) All of the above are techniques for employee empowerment.
A system in which the customer receives service from only one station and then exits
the system is
A) a single-phase system
B) a single channel system
C) a multiple-channel system
D) a multiple-phase system
E) none of the above
Managers should seek to control such work environment factors as
A) illumination
B) noise and vibration
C) temperature
D) air quality
E) all of the above
What is the expected value with perfect information in the following decision table?
A) 50
B) 200
C) 260
D) 300
E) 350
In terms of decision theory, an occurrence or situation over which the decision maker
has no control is called a(n)
A) decision under uncertainty
B) decision tree
C) state of nature
D) alternative
E) none of the above
A system has six components in series. Each component has a reliability of 0.99. What
is the reliability of the system?
State, in order, the three steps in making an initial allocation with the northwest-corner
rule.
Identify the reasons for buying in the make-or-buy decision.
A company is trying to implement MRP but is having trouble determining which order
sizing method will minimize costs. Setup cost is $200 and holding cost is $2/period. If
each period is 1 week, gross requirements are 270 units per 10 weeks, and there are 6
planned order releases for every 10 weeks, calculate the cost for lot-for-lot compared to
EOQ for an entire year. Assume that EOQ and lot-for-lot are computed as though the
usage will occur continually throughout the year.
A synonym for shadow price is __________.