Pregunta 1
Pregunta
In the A-B-C system, the typical percentage of the number of items in inventory for A items is about:
Pregunta 2
Pregunta
In the A-B-C classification system, which account for 15% of the total dollar-volume for a majority of the inventory items would be classified as:
Respuesta
-
A items
-
B items
-
C items
-
A items plus B items
-
B items plus C items
Pregunta 3
Pregunta
In the A-B-C classification system, items which account for 60% of the total dollar-volume for few inventory items would be classified as:
Respuesta
-
A items
-
B items
-
C items
-
A items plus B items
-
B items plus C items
Pregunta 4
Pregunta
The EOQ model is most relevant for which one of the following?
Respuesta
-
ordering items with dependent demand
-
determination of safety stock
-
ordering perishable items
-
determining fixed interval order quantities
-
determining fixed order quantities
Pregunta 5
Pregunta
Which is not a true assumption in the EOQ model?
Pregunta 6
Pregunta
A cycle count program will usually require that 'A' items be counted:
Pregunta 7
Pregunta
In the basic EOQ model, if annual demand doubles, the effect on the EOQ is:
Respuesta
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it doubles
-
it is four times the previous amount
-
it is half its previous amount
-
it is about 70% of its previous amount
-
it increases by about 40%
Pregunta 8
Pregunta
In the basic EOQ model, if lead time increases from 5 to 10 days, the EOQ will:
Pregunta 9
Pregunta
In the basic EOQ model, an annual demand of 40 units, an ordering cost of $5, and a holding cost of $1 per unit per year will result in an EOQ of:
Respuesta
-
20
-
square root of 200
-
200
-
400
-
none of these
Pregunta 10
Pregunta
In the basic EOQ model, if D=60 per month, S=$12, and H=$10 per unit per month, EOQ is:
Pregunta 11
Pregunta
In the basic EOQ model, if annual demand is 50, carrying cost is $2, and ordering cost is $15, EOQ is approximately:
Pregunta 12
Pregunta
If average demand for an inventory item is 200 units per day, lead time is 3 days, and safety stock is 100 units, the reorder point is:
Respuesta
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100 units
-
200 units
-
300 units
-
600 units
-
700 units
Pregunta 13
Pregunta
If no variations in demand or lead time exist, the ROP will equal:
Pregunta 14
Pregunta
Which one of the following isa implied by a "lead time" service level of 95%?
Respuesta
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Approximately 95% of the demand during lead time will be satisfied
-
Approximately 95% of inventory will be used during lead time
-
The probability is 95% that demand during the lead time will exactly equal the amount on hand at the beginning of lea time
-
The probability is 95% that demand during lead time will not exceed the amount on hand at the beginning of lead time.
-
none of the above
Pregunta 15
Pregunta
Which one of the following is implied by an "annual" service level of 95%?
Respuesta
-
Approximately 95% of demand during lead time will be satisfied
-
The probability is 95% that demand will exceed supply during lead time
-
The probability is 95% that demand will equal supply during lead time
-
The probability is 95% that demand will not exceed supply during lead time
-
None of the above
Pregunta 16
Pregunta
Daily usage is exactly 60 gallons per day. Lead time is normally distributed with a mean of 10 days and a standard deviation of 2 days. What is the standard deviation of demand during lead time?
Pregunta 17
Pregunta
Lead time is exactly 20 days long. Daily demand is normally distributed with a mean of 10 gallons per day and a standard deviation of 2 gallons. What is the standard deviation of demand during lead time?
Pregunta 18
Pregunta
Which of these products would be most apt to involve the use of a single-period model?
Respuesta
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gold coins
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hammars
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fresh fish
-
calculators
-
frozen corn
Pregunta 19
Pregunta
In a single-period model, if shortage and excess costs are equal, then the optimum service level is:
Respuesta
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0
-
.33
-
.50
-
.67
-
none of these
Pregunta 20
Pregunta
In a single-period model, if shortage cost is four times excess cost, then the optimum service level is percent.
Pregunta 21
Pregunta
In the single-period model, if excess cost is double shortage cost, the approximate stockout risk, assuming an optimum service level, is percent.
Pregunta 22
Pregunta
If, in a single-period inventory situation, the probabilities of demand being 1, 2, 3, or 4 units are .3, .3, .2, and .2, respectively. If two units are stocked, what is the probability of selling both of them?
Respuesta
-
.5
-
.6
-
.7
-
.8
-
none of these
Pregunta 23
Pregunta
If average demand for an item is 20 units per day, safety stock is 50 units, and lead time is four days, the ROP will be:
Pregunta 24
Pregunta
Suppose that usage of cooking oil at Harry's Fish Fry is normally distributed with an average of 15 gallons/day and a standard deviation of two gallons/day. Harry has just fired the manager and taken over operating the restaurant himself. Harry has asked you to help him decide how to reorder cooking oil in order to achieve a service level which is seven times the risk of stockout (7/8). Lead time is eight days. Assume that cooking oil can be ordered as needed.
Respuesta
-
185.30
-
126.50
-
150
-
122.50
-
167.85
Pregunta 25
Pregunta
A bakery's use of corn sweetener is normally distributed with a mean of 80 gallons per day and a standard deviation of four gallons per day. Lead time for delivery of the corn sweetener is normal with a mean of six days and a standard deviation of two days. If the manager wants a service level of 99 percent, what reorder point should be used?
Pregunta 26
Pregunta
A manufacturer is contemplating a switch from buying to producing a certain item. Setup cost would be the same as ordering cost. The production rate would be about double the usage rate.
Compared to the EOQ, the economic production quantity would be approximately:
Respuesta
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the same
-
20% larger
-
40% larger
-
20% smaller
-
40% smaller
Pregunta 27
Pregunta
A manufacturer is contemplating a switch from buying to producing a certain item. Setup cost would be the same as ordering cost. The production rate would be about double the usage rate.
Compared to the EOQ, the maximum inventory would be approximately:
Respuesta
-
70% higher
-
30% higher
-
the same
-
30% lower
-
70% lower
Pregunta 28
Pregunta
The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
At what point should he reorder Stein beer?
Respuesta
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0 cases remaining
-
4 cases remaining
-
12 cases remaining
-
16 cases remaining
-
20 cases remaining
Pregunta 29
Pregunta
The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
If he were to order 16 cases of Stein beer at a time, what would be the length of an order cycle?
Respuesta
-
0.25 days
-
3 days
-
1 day
-
4 days
-
20 days
Pregunta 30
Pregunta
The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
If he were to order 16 cases of Stein beer at a time, what would be the average inventory level?
Respuesta
-
4 cases
-
12 cases
-
8 cases
-
20 cases
-
16 cases
Pregunta 31
Pregunta
The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
If he were to order 16 cases of Stein beer at a time, what would be the daily total inventory costs, EXCLUDING the cost of the beer?
Respuesta
-
$2.00
-
$4.00
-
$1.28
-
$3.28
-
$2.56
Pregunta 32
Pregunta
The manager of the Quick Stop Corner Convenience Store (which never closes) sells four cases of Stein beer each day. Order costs are $8.00 per order, and Stein beer costs $.80 per six-pack (each case of Stein beer contains four six-packs). Orders arrive three days from the time they are placed. Daily holding costs are equal to five percent of the cost of the beer.
What is the economic order quantity for Stein beer?
Respuesta
-
8 cases
-
11 cases
-
14 cases
-
20 cases
-
32 cases
Pregunta 33
Pregunta
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:
Sample Service Life (hours)
1 195 500 505 500
2 525 515 505 515
3 470 480 460 470
90. What is the sample mean service life for sample 2?
Respuesta
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460 hours
-
495 hours
-
500 hours
-
515 hours
-
525 hours
Pregunta 34
Pregunta
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:
Sample Service Life (hours)
1 195 500 505 500
2 525 515 505 515
3 470 480 460 470
What is the mean of the sampling distribution of sample means when service life is in control?
Respuesta
-
250 hours
-
470 hours
-
495 hours
-
500 hours
-
515 hours
Pregunta 35
Pregunta
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:
Sample Service Life (hours)
1 195 500 505 500
2 525 515 505 515
3 470 480 460 470
What is the standard deviation of the sampling distribution of sample means for whenever service life is in control?
Respuesta
-
5 hours
-
6.67 hours
-
10 hours
-
11.55 hours
-
20 hours
Pregunta 36
Pregunta
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:
Sample Service Life (hours)
1 195 500 505 500
2 525 515 505 515
3 470 480 460 470
If he uses upper and lower control limits of 520 and 480 hours, what is his risk (alpha) of concluding service life is out of control when it is actually under control (Type I error)?
Respuesta
-
0.0026
-
0.0456
-
0.3174
-
0.6826
-
0.9544
Pregunta 37
Pregunta
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:
Sample Service Life (hours)
1 195 500 505 500
2 525 515 505 515
3 470 480 460 470
If he uses upper and lower control limits of 520 and 480 hours, on what sample(s) (if any) does service life appear to be out of control?
Pregunta 38
Pregunta
The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are under control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results:
Instructor Number of Failures
Prof. A 13
Prof. B 0
Prof. C 11
Prof. D 16
What is the sample proportion of failures (p) for Prof. D?
Pregunta 39
Pregunta
The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are under control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results:
Instructor Number of Failures
Prof. A 13
Prof. B 0
Prof. C 11
Prof. D 16
What is the estimate of the mean proportion of failures for these instructors?
Pregunta 40
Pregunta
The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are under control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results:
Instructor Number of Failures
Prof. A 13
Prof. B 0
Prof. C 11
Prof. D 16
What is the estimate of the standard deviation of the sampling distribution for an instructor's sample proportion of failures?
Pregunta 41
Pregunta
The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are under control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results:
Instructor Number of Failures
Prof. A 13
Prof. B 0
Prof. C 11
Prof. D 16
What are the .95 (5% risk of Type I error) upper and lower control limits for the p-chart?
Respuesta
-
.95 and .05
-
.13 and .07
-
.1588 and .0412
-
.16 and .04
-
.1774 and .0226
Pregunta 42
Pregunta
The Chair of the Operations Management Department at Quality University wants to construct a p-chart for determining whether the four faculty teaching the basic P/OM course are under control with regard to the number of students who fail the course. Accordingly, he sampled 100 final grades from last year for each instructor, with the following results:
Instructor Number of Failures
Prof. A 13
Prof. B 0
Prof. C 11
Prof. D 16
Using .95 control limits, (5% risk of Type I error), which instructor(s), if any, should he conclude is (are) out of control?
Respuesta
-
none
-
Prof. B
-
Prof. D
-
both Prof. B and Prof. D
-
all
Pregunta 43
Pregunta
A Quality Analyst wants to construct a control chart for determining whether four machines, all producing the same product, are under control with regard to a particular quality attribute. Accordingly, she inspected 1,000 units of output from each machine in random samples, with the following results:
Machine Total Defectives
#1 23
#2 15
#3 29
#4 13
What is the sample proportion of defectives for machine #1?
Respuesta
-
.023
-
.02
-
.0115
-
.0058
-
.005
Pregunta 44
Pregunta
A stint for use is coronary surgery requires a special coating. Specifications for this coating call for it to be at least 0.05 millimeters but no more than 0.15 millimeters.
Suppose the criterion for evaluating this process is that the appropriate capability index must be at least 1.3.
With a long-run process mean of 0.09 and a standard deviation of 0.015, is this process capable?
Pregunta 45
Pregunta
Studies on a bottle-filling machine indicates it fills bottles to a mean of 16 ounces with a standard deviation of 0.10 ounces. What is the process specification, assuming the Cpk index of 1?
Pregunta 46
Pregunta
Studies on a machine that molds plastic water pipe indicate that when it is injecting 1-inch diameter pipe, the process standard deviation is 0.05 inches. The one-inch pipe has a specification of 1-inch plus or minus 0.10 inch. What is the process capability index (Cpk) if the long-run process mean is 1 inch?
Respuesta
-
0.50
-
0.67
-
1.00
-
2.00
-
none of the above
Pregunta 47
Pregunta
The specification limit for a product is 8 cm and 10 cm. A process that produces the product has a mean of
9.5 cm and a standard deviation of 0.2 cm. What is the process capability, Cpk?
Respuesta
-
3.33
-
1.67
-
0.83
-
2.50
-
none of the above
Pregunta 48
Pregunta
The specifications for a product are 6 mm ± 0.1 mm. The process is known to operate at a mean of 6.05 with a standard deviation of 0.01 mm. What is the Cpk for this process?
Respuesta
-
3.33
-
1.67
-
5.00
-
2.50
-
none of the above
Pregunta 49
Pregunta
138. A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with___________________.
Respuesta
-
p-charts
-
c-charts
-
x-bar charts
-
r-charts
-
o-charts
Pregunta 50
Pregunta
When a process is in control, it results in there being, on average, 16 defects per unit of output. C-chart limits of 8 and 24 would lead to a ________________ chance of a Type I error.
Pregunta 51
Pregunta
When a process is in control, it results in there being, on average, 16 defects per unit of output. C-chart limits of 4 and 28 would lead to a chance of a Type I error.
Pregunta 52
Pregunta
A tool that is not used for quality management is ________________.
Respuesta
-
Flowchart
-
Histogram
-
Perato Analysis
-
Redesign
-
Check sheets
Pregunta 53
Pregunta
The four dimensions of quality that are sometimes used to determine fitness for use of a product are
Respuesta
-
performance, special features, durability, and service after sale
-
performance, special features, conformance, and reliability
-
special features, conformance, reliability, and durability
-
performance, conformance, reliability, and durability
-
special features, conformance, durability, and service after sale
Pregunta 54
Pregunta
A tool that depicts process variation graphically is a(n) .
Respuesta
-
Affinity diagram
-
Check list
-
Control Chart
-
Flow Chart
-
Relationship diagram
Pregunta 55
Pregunta
Which isn't a cost of quality?
Pregunta 56
Pregunta
Lost production time, scrap, and rework are examples of
Respuesta
-
internal failure costs
-
external failure costs
-
appraisal costs
-
prevention costs
-
replacement costs
Pregunta 57
Pregunta
Warranty service, processing of complaints, and costs of litigation are examples of
Respuesta
-
internal failure costs
-
external failure costs
-
appraisal costs
-
prevention costs
-
replacement costs
Pregunta 58
Pregunta
Costs of inspectors, testing, test equipment, and labs are examples of
Respuesta
-
internal failure costs
-
external failure costs
-
appraisal costs
-
prevention costs
-
replacement costs
Pregunta 59
Pregunta
Loss of business, liability, productivity and costs are consequences of
Respuesta
-
Labor Unions
-
Globalization
-
Poor Quality
-
Robotics
-
Micro-factories
Pregunta 60
Pregunta
Quality planning and administration, quality training, and quality control procedures are examples of
Respuesta
-
internal failure costs
-
external failure costs
-
appraisal costs
-
prevention costs
-
replacement costs
Pregunta 61
Pregunta
ISO 9000 standards do not have a requirement for
Respuesta
-
resource
-
remedial
-
systems
-
training
-
management
Pregunta 62
Pregunta
A quality circle is
Pregunta 63
Pregunta
ISO 9000 currently requires of a certified organization
Pregunta 64
Pregunta
The quality control improvement tool which distinguishes between the "important few" and the "trivial many" is
Pregunta 65
Pregunta 66
Pregunta
Which of the following is an element of TQM?
Respuesta
-
continuous improvement
-
competitive benchmarking
-
employee empowerment
-
team approach
-
all of the above
Pregunta 67
Pregunta
85. Management behaviors supporting an organizational culture that encourages continuous improvement include which of the following?
(I) develop a vision statement for the organization
(II) develop a reward system that promotes the philosophy
(III) institute continuous training programs
(IV) make decisions that adhere to the philosophy
Respuesta
-
I, II, and IV
-
I, II, III, and IV
-
I and III
-
II, III, and IV
-
II and IV
Pregunta 68
Pregunta
The tool that is useful in the collection and organization of data is:
Respuesta
-
a control chart
-
a Pareto chart
-
a check sheet
-
a flow chart
-
none of the above
Pregunta 69
Pregunta
A quality improvement technique that involves the sharing of thoughts and ideas in a way that encourages unrestrained collective thinking is:
Respuesta
-
Pareto analysis
-
benchmarking
-
brainstorming
-
a control chart
-
a check sheet
Pregunta 70
Pregunta
In order for TQM to be successful, it is essential that most of the organization be
Respuesta
-
members of quality circles
-
under contract
-
ISO certified
-
trained in error detection techniques
-
in agreement with the philosophy and its goals
Pregunta 71
Pregunta
The typical difference between "quality circles" and "continuous improvement teams" is
Respuesta
-
Quality circles work on product design only
-
Continuous improvement teams work on product and process design
-
Continuous improvement teams use only engineers while quality circles use just the workers doing the work
-
the amount of employee empowerment
-
There is no difference-they are just the same
Pregunta 72
Pregunta
Which of the following is not a goal of process improvement?