Deck 14: Statistical Process Control

Question 1

Samples which are ordered by time or sequence are called

A)systematic samples.
B)random samples.
C)nonrandom samples.
D)biased samples.

Answer 1

A

Question 2

Samples which are ordered by time or sequence are called systematic samples.

Answer 2

True

Question 3

A process that is stable has no variation present in the process.

Answer 3

False

Question 4

Variation that results from a specific event,which may be a shift in a process mean or an unexpected occurrence,is known as ________ variation.

Question 5

Graphs designed to signal process workers when nonrandom variation occurs in a process are called ________.

Question 6

A manufacturer of snow shovels sees a drop in the demand for snow shovels due to an unseasonally warm winter.This means that the demand experiences

A)random variation.
B)nonrandom variation.
C)seasonal variation.
D)no variation.

Question 7

Variation that centers on a mean and occurs with a somewhat consistent amount of dispersion is known as ________ variation.

Question 8

The width of a distribution is called the mean.

Question 9

The cost of inspection for three different product characteristics A,B,and C,is $10,$12 and $8 respectively.The cost of failure if any one of them breaks down is $100 (full replacement cost of the product).Where should the priority to inspect first be?

A)A
B)B
C)C
D)None of the above

Question 10

The cost of inspection for three different product characteristics A,B,and C,is $10,$12 and $8 respectively.The cost of failure if any one of them breaks down is $100 (full replacement cost of the product).What is the inspection ratio for B?

A)0)10
B)0)08
C)0)12
D)0)05

Question 11

The width of a distribution is called the ________.

Question 12

Samples gathered in such a way that every piece of product has an equal chance of being selected for inspection are called systematic samples.

Question 13

The jump in sales of hand sanitizers experienced by the manufacturer of sanitizing products due to a scare of H1N1 virus outbreak is known as ________ variation.

Question 14

Every 10th product coming off a production line is inspected to check for quality.Such a sampling technique is called

A)systematic sampling.
B)random sampling.
C)nonrandom sampling.
D)biased sampling.

Question 15

Data gathered to check if a process is stable is called ________.

Question 16

Variation that results from a specific event,which may be a shift in a process mean or an unexpected occurrence,is known as random variation.

Question 17

Concluding that a process is stable means only ________ variation is present in the process.

Question 18

A quality manager concludes that a process is stable.This means that

A)there is no variation present in the process.
B)there is only random variation present in the process.
C)there is only nonrandom variation present in the process.
D)none of the above.

Question 19

Samples gathered in such a way that every piece of product has an equal chance of being selected for inspection are called

A)systematic samples.
B)random samples.
C)nonrandom samples.
D)biased samples.

Question 20

Variation that centers on a mean and occurs with a somewhat consistent amount of dispersion is known as random variation.

Question 21

The ratio between the cost of inspection and the cost of failure resulting from a particular step in the process is called ________.

Question 22

The control chart used to measure the number of defects per unit is called the

A)p-chart.
B)R-chart.
C)c-chart.
D)u-chart.

Question 23

Samples gathered in such a way that every piece of product has an equal chance of being selected for inspection are called ________.

Question 24

The control chart used to monitor the dispersion of a process is called the

A)p-chart.
B)R-chart.
C)c-chart.
D)u-chart.

Question 25

A process which is in control is always a capable process.

Question 26

Every 10th product coming off a production line is inspected to check for quality.Such a sampling technique is called ________.

Question 27

A continuous measurement such as weight,height,or volume is known as

A)attribute.
B)variable.
C)systematic.
D)proportion.

Question 28

The control chart used to count the number nonconforming in a consistent sample space is called the

A)p-chart.
B)R-chart.
C)c-chart.
D)u-chart.

Question 29

The control chart used to monitor the average of the characteristic being measured is called an R-chart.

Question 30

Quality inspection performed during the production process is called ________.

Question 31

A continuous measurement such as weight,height,or volume is known as an attribute.

Question 32

A measurement to determine if a defect is either present or not is known as an attribute.

Question 33

A measurement to determine if a defect is either present or not is known as

A)attribute.
B)variable.
C)systematic.
D)proportion.

Question 34

A bottling plant measures the volume of liquid in the bottle.The control chart which will be used with such a measurement is a

A)p-chart.
B)X-bar chart.
C)c-chart.
D)u-chart.

Question 35

Each point on the control chart represents data from samples that are plotted sequentially over time.

Question 36

Samples which are ordered by time or sequence are called ________.

Question 37

The control chart used to count the number nonconforming in a consistent sample space is called the c chart.

Question 38

The control chart used to measure the proportion defective is called the u chart.

Question 39

p control charts are used with variable measurements.

Question 40

The control chart used to measure the proportion defective is called the

A)p-chart.
B)R-chart.
C)c-chart.
D)u-chart.

Question 41

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required:

A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below:

What is the value of the average range R-bar?

A)3)68
B)8)398
C)3)125
D)5)252

Question 42

The control chart used to measure the proportion defective is called the ________ chart.

Question 43

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required:

A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below:

What is the LCL for a X-bar chart?

A)253.218
B)247.852
C)250
D)252.527

Question 44

A control chart needs to be developed to determine if the proportion of late deliveries of a pizza delivery restaurant is within control limits.The control chart which would be most appropriate to use in this situation would be the

A)p-chart.
B)R-chart.
C)c-chart.
D)u-chart.

Question 45

The control chart used to monitor the average of the characteristic being measured is called a(n)________ chart.

Question 46

A control chart needs to be developed to determine if the temperature for a process is within control limits.The control chart which would be most appropriate to use in this situation would be the

A)p-chart.
B)X-bar chart.
C)c-chart.
D)u-chart.

Question 47

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required:

A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below:

What is the value of the grand mean?

A)249.325
B)251.300
C)250.535
D)248.500

Question 48

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required:

A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below:

What is the LCL for a R chart?

A)3)68
B)8)398
C)3)125
D)0

Question 49

The control chart used to monitor the dispersion of a process is called a(n)________ chart.

Question 50

Use the information below to answer the following question(s).
An inspector visually inspects 10 samples of 200 computer monitors each for defects. Using trained judgement,the inspector either accepts or rejects the monitors based on whether they are flawless. The table below gives the results of these inspections from the 10 samples:

What is the UCL for a p chart?

A)0)050
B)0)048
C)0)053
D)0)0091

Question 51

Aspects of the product that will result in either good or poor function of the product are known as ________.

Question 52

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required:

A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below:

What is the UCL for a X-bar chart?

A)253.218
B)247.852
C)250
D)252.527

Question 53

The central limit theorem states that sampling distributions generally are ________ distributed.

Question 54

Use the information below to answer the following question(s).
An inspector visually inspects 10 samples of 200 computer monitors each for defects. Using trained judgement,the inspector either accepts or rejects the monitors based on whether they are flawless. The table below gives the results of these inspections from the 10 samples:

What is the LCL for a p chart?

A)0)050
B)0)000
C)0)053
D)0)0091

Question 55

Use the information below to answer the following question(s). Use the "Factors for Control Limits" Table A.3 from the textbook where required:

A control chart needs to be developed to determine if the temperature for a process is within control limits. Five samples each having 4 observations are taken and the sample measurements (temperature in degrees F)are noted in the table below:

What is the UCL for a R chart?

A)3)68
B)8)398
C)3)125
D)0

Question 56

Use the information below to answer the following question(s).
An inspector visually inspects 10 samples of 200 computer monitors each for defects. Using trained judgement,the inspector either accepts or rejects the monitors based on whether they are flawless. The table below gives the results of these inspections from the 10 samples:

What is the average proportion defective?

A)0)022
B)0)025
C)0)018
D)0)027

Question 57

A continuous measurement such as weight,height,or volume is known as a ________.

Question 58

The rule that states that sampling distributions generally are normally distributed is known as the ________.

Question 59

A measurement to determine if a defect is either present or not is known as a(n)________.

Question 60

The control chart used to count the number nonconforming in a consistent sample space is called the ________ chart.

Question 61

On a control chart,________ successive data points on an increasing or decreasing line require an investigation for cause of progressive change.

Question 62

On a control chart,one data point out above the control limit is considered normal behavior.

Question 63

A process that exhibits nonrandom variation is a(n)________ process.

Question 64

On a control chart,two data points near the UCL requires an investigation for the cause of variation,however two data points near the LCL does not call for any investigation and is part of normal behavior.

Question 65

Fifty sample measurements of the length of an automotive component yield a grand mean of 1.33 inches with an estimated standard deviation of 0.2 inches.The specification length is between 1.2 and 1.4 inches.Is the process capable of meeting the required specifications?

A)Yes
B)No
C)Insufficient information to determine
D)Barely capable

Question 66

Adjusting a process when it only exhibits random variation is called ________.

Question 67

Five points in sequence,either above or below the mean are called ________.

Question 68

A comparative measure of the extent to which individual products meet specification is known as ________.

Question 69

The ability of a process to produce a product that meets specification is known as ________.

Question 70

A process that is out of control exhibits ________ variation.

Question 71

A process capability measure of 1.00 or below indicates that the process is capable.

Question 72

On a control chart,how many successive data points on an increasing or decreasing line require an investigation for cause of progressive change?

A)7 or more
B)5 or more
C)4 or more
D)3 or more

Question 73

Fifty sample measurements of the length of an automotive component yield a grand mean of 1.33 inches with an estimated standard deviation of 0.2 inches.The specification length is between 1.2 and 1.4 inches.Calculate the process capability index.

A)0)1167
B)0)18
C)0)2167
D)0)2877

Question 74

Seven points in succession,all increasing or decreasing in a process chart are called ________.