Question 1

In the context of statistical process control and variation,if no special causes affect the output of a process,we say that the process is _____.

Accepted Answer

A)  inconsistent 
B)  out of control 
C)  in control 
D)  overadjusted 
A)  inconsistent 
B)  out of control 
C)  in control 
D)  overadjusted C

Question 2

The control limits represent the range between which all points are expected to fall if the process is in statistical control.

Accepted Answer

A) True 
 B)False  True

Question 3

Which of the following is the upper control limit for a c-chart (UCLc)with the average number of nonconformances per unit equal to 7?

Accepted Answer

A)  More than 11 but less than or equal to 12 
B)  More than 12 but less than or equal to 13 
C)  More than 13 but less than or equal to 14 
D)  More than 14 but less than or equal to 15 
A)  More than 11 but less than or equal to 12 
B)  More than 12 but less than or equal to 13 
C)  More than 13 but less than or equal to 14 
D)  More than 14 but less than or equal to 15 D

Question 4

In the context of the net promoter score (NPS),which of the following is a difference between promoters and detractors?

Accepted Answer

A)  Unlike promoters,detractors are customers who are associated with scores of 7 or 8. 
B)  Unlike promoters,detractors are satisfied customers who may switch to competitors. 
C)  Unlike promoters,detractors defect at higher rates. 
D)  Unlike promoters,detractors are less price sensitive. 
A)  Unlike promoters,detractors are customers who are associated with scores of 7 or 8. 
B)  Unlike promoters,detractors are satisfied customers who may switch to competitors. 
C)  Unlike promoters,detractors defect at higher rates. 
D)  Unlike promoters,detractors are less price sensitive.

Question 5

A hotel chain periodically analyzes its service times to check for variation in service processes.To do this,it uses R-charts.Seven samples,each containing observed checkout time with three different customers,were collected.The average mean and the average range of the service times are found to be 9.924 and 0.957,respectively.If D4 for the R-chart is 1.924,the upper control limit (UCLR)for the R-chart will be:

Accepted Answer

A)  less than or equal to 1.0. 
B)  greater than 1.0 but less than or equal to 1.5. 
C)  greater than 1.5 but less than or equal to 2.0. 
D)  greater than 2.0 but less than or equal to 2.5. 
A)  less than or equal to 1.0. 
B)  greater than 1.0 but less than or equal to 1.5. 
C)  greater than 1.5 but less than or equal to 2.0. 
D)  greater than 2.0 but less than or equal to 2.5.

Question 6

Which of the following is true of special cause variation?

Accepted Answer

A)  It cannot be explained or understood. 
B)  It occurs sporadically and can be prevented. 
C)  It cannot be detected using statistical methods. 
D)  It accounts for about 80 to 95 percent of the observed variation in a process. 
A)  It cannot be explained or understood. 
B)  It occurs sporadically and can be prevented. 
C)  It cannot be detected using statistical methods. 
D)  It accounts for about 80 to 95 percent of the observed variation in a process.

Question 7

Which of the following is true of common cause variation?

Accepted Answer

A)  It can be controlled and described using nonstatistical methods. 
B)  It appears at random,and individual sources cannot be identified or explained. 
C)  It accounts for about 10 to 15 percent of the observed variation in a process. 
D)  It arises from external sources that are not inherent in a process. 
A)  It can be controlled and described using nonstatistical methods. 
B)  It appears at random,and individual sources cannot be identified or explained. 
C)  It accounts for about 10 to 15 percent of the observed variation in a process. 
D)  It arises from external sources that are not inherent in a process.

Question 8

Customer waiting time and order lead time are examples of _____ metrics.

Accepted Answer

A)  discrete 
B)  countable 
C)  isolated 
D)  continuous 
A)  discrete 
B)  countable 
C)  isolated 
D)  continuous

Question 9

Overadjusting a process that is in control will decrease the variation in the output.

Accepted Answer

A) True 
 B)False

Question 10

In the context of designing control charts,which of the following is true of a sample size?

Accepted Answer

A)  A large sample allows small changes in process characteristics to be detected with higher probability than a small sample size. 
B)  A small sample is used to detect process shifts of two standard deviations or smaller. 
C)  A large sample size is desirable to keep the cost associated with sampling low. 
D)  A small sample size provides greater degrees of statistical accuracy in estimating the true state of control than a large sample size. 
A)  A large sample allows small changes in process characteristics to be detected with higher probability than a small sample size. 
B)  A small sample is used to detect process shifts of two standard deviations or smaller. 
C)  A large sample size is desirable to keep the cost associated with sampling low. 
D)  A small sample size provides greater degrees of statistical accuracy in estimating the true state of control than a large sample size.

Question 11

Designing control charts involves two key issues: sample size and sampling frequency.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is the upper control limit for a c-chart (UCLc)with the average number of nonconformances per unit equal to 7?

Accepted Answer

A)  More than 11 but less than or equal to 12 
B)  More than 12 but less than or equal to 13 
C)  More than 13 but less than or equal to 14 
D)  More than 14 but less than or equal to 15 
A)  More than 11 but less than or equal to 12 
B)  More than 12 but less than or equal to 13 
C)  More than 13 but less than or equal to 14 
D)  More than 14 but less than or equal to 15

Question 13

When the _____ is extremely low,standard control charts are not effective.

Accepted Answer

A)  efficiency rate 
B)  demand flow 
C)  rate of defects 
D)  perceived value 
A)  efficiency rate 
B)  demand flow 
C)  rate of defects 
D)  perceived value

Question 14

In-process control is typically performed by people who run the back-end processes.

Accepted Answer

A) True 
 B)False

Question 15

A process capability study is designed to yield specific information about _____.

Accepted Answer

A)  the effect of changing one aspect of a system at a time 
B)  the rate of decay of a system as the equipment ages and begins to fail 
C)  the performance of a process under specified operating systems 
D)  how introducing multiple variances in the system at once affect the outcome of a process 
A)  the effect of changing one aspect of a system at a time 
B)  the rate of decay of a system as the equipment ages and begins to fail 
C)  the performance of a process under specified operating systems 
D)  how introducing multiple variances in the system at once affect the outcome of a process

Question 16

Keeping special cause variation from occurring is the essence of statistical quality control.

Accepted Answer

A) True 
 B)False

Question 17

In the context of the net promoter score (NPS),scores of 6 or below represent _____,unhappy customers who may spread negative comments.

Accepted Answer

A)  detractors 
B)  passives 
C)  promoters 
D)  campaigners 
A)  detractors 
B)  passives 
C)  promoters 
D)  campaigners

Question 18

If a process has a process capability index value (Cp)of less than 1,it means that:

Accepted Answer

A)  a significant percentage of output will not conform to the design specifications. 
B)  both the lower and upper specification limits are met. 
C)  the observed variation is the same as the design specification width. 
D)  the process is very capable of meeting the upper specification limit. 
A)  a significant percentage of output will not conform to the design specifications. 
B)  both the lower and upper specification limits are met. 
C)  the observed variation is the same as the design specification width. 
D)  the process is very capable of meeting the upper specification limit.

Question 19

An operator wants to determine the standard deviation for a machine she operates.To do this,she wants to create a p-chart.Over a month's time,she collects 30 samples of 75 observations each and records the number of errors.The average proportion defective is found to be 0.024.Which of the following is the standard deviation (s)of the machine?

Accepted Answer

A)  Less than or equal to 0.1 
B)  More than 0.1 but less than or equal to 0.5 
C)  More than 0.5 but less than or equal to 1.0 
D)  More than 1.0 
A)  Less than or equal to 0.1 
B)  More than 0.1 but less than or equal to 0.5 
C)  More than 0.5 but less than or equal to 1.0 
D)  More than 1.0

Question 20

A discrete metric is one that is calculated from data that are counted.

Accepted Answer

A) True 
 B)False

In the context of statistical process control and variation,if no special causes affect the output of a process,we say that the process is _____.

The control limits represent the range between which all points are expected to fall if the process is in statistical control.

Which of the following is the upper control limit for a c-chart (UCL_c)with the average number of nonconformances per unit equal to 7?

In the context of the net promoter score (NPS),which of the following is a difference between promoters and detractors?

Which of the following is true of special cause variation?

Which of the following is true of common cause variation?

Customer waiting time and order lead time are examples of _____ metrics.

Overadjusting a process that is in control will decrease the variation in the output.

In the context of designing control charts,which of the following is true of a sample size?

Designing control charts involves two key issues: sample size and sampling frequency.

Which of the following is the upper control limit for a c-chart (UCL_c)with the average number of nonconformances per unit equal to 7?

When the _____ is extremely low,standard control charts are not effective.

In-process control is typically performed by people who run the back-end processes.

A process capability study is designed to yield specific information about _____.

Keeping special cause variation from occurring is the essence of statistical quality control.

In the context of the net promoter score (NPS),scores of 6 or below represent _____,unhappy customers who may spread negative comments.

If a process has a process capability index value (C_p)of less than 1,it means that:

A discrete metric is one that is calculated from data that are counted.

Operations Management and Value Chains

Measuring Performance in Operations and Value Chains

Operations Strategy

Technology and Operations Management

Goods and Service Design

Supply Chain Design

Process Selection,design,and Improvement

Facility and Work Design

Forecasting and Demand Planning

Capacity Management

Process Analysis and Resource Utilization

Managing Inventories in Supply Chains

Supply Chain Management and Logistics

Resource Management

Operations Scheduling and Sequencing

Quality Management

Lean Operating Systems

Project Management

Filters

Exam 17: Quality Control Spc

In the context of statistical process control and variation,if no special causes affect the output of a process,we say that the process is _____.

The control limits represent the range between which all points are expected to fall if the process is in statistical control.

Which of the following is the upper control limit for a c-chart (UCLc)with the average number of nonconformances per unit equal to 7?

In the context of the net promoter score (NPS),which of the following is a difference between promoters and detractors?

Which of the following is true of special cause variation?

Which of the following is true of common cause variation?

Customer waiting time and order lead time are examples of _____ metrics.

Overadjusting a process that is in control will decrease the variation in the output.

In the context of designing control charts,which of the following is true of a sample size?

Designing control charts involves two key issues: sample size and sampling frequency.

Which of the following is the upper control limit for a c-chart (UCLc)with the average number of nonconformances per unit equal to 7?

When the _____ is extremely low,standard control charts are not effective.

In-process control is typically performed by people who run the back-end processes.

A process capability study is designed to yield specific information about _____.

Keeping special cause variation from occurring is the essence of statistical quality control.

In the context of the net promoter score (NPS),scores of 6 or below represent _____,unhappy customers who may spread negative comments.

If a process has a process capability index value (Cp)of less than 1,it means that:

A discrete metric is one that is calculated from data that are counted.

Operations Management and Value Chains

Measuring Performance in Operations and Value Chains

Operations Strategy

Technology and Operations Management

Goods and Service Design

Supply Chain Design

Process Selection,design,and Improvement

Facility and Work Design

Forecasting and Demand Planning

Capacity Management

Process Analysis and Resource Utilization

Managing Inventories in Supply Chains

Supply Chain Management and Logistics

Resource Management

Operations Scheduling and Sequencing

Quality Management

Lean Operating Systems

Project Management

Filters

Which of the following is the upper control limit for a c-chart (UCL_c)with the average number of nonconformances per unit equal to 7?

Which of the following is the upper control limit for a c-chart (UCL_c)with the average number of nonconformances per unit equal to 7?

If a process has a process capability index value (C_p)of less than 1,it means that: