Question 1

The six sigma quality improvement methodology is called:

Accepted Answer

A)  PDSA 
B)  DMAIC 
C)  5W2H 
D)  continuous improvement system. 
E)  none of the choices are correct. 
A)  PDSA 
B)  DMAIC 
C)  5W2H 
D)  continuous improvement system. 
E)  none of the choices are correct.

Question 2

What is the estimate of the mean proportion of failures,(p̅)for these instructors?

Accepted Answer

A)  .10 
B)  .11 
C)  .13 
D)  .16 
E)  .40 
A)  .10 
B)  .11 
C)  .13 
D)  .16 
E)  .40

Question 3

Control limits and process variability are directly related.

Accepted Answer

A) True 
 B)False

Question 4

Typically the production of high-cost,low-volume items require little quality control inspection.

Accepted Answer

A) True 
 B)False

Question 5

Given the following process control data for a quality attribute (three samples of size 400 each):
  
-If the process is known to produce 11 percent defectives on average,what is the alpha risk (probability of Type I error)for upper and lower control limits of .1256 and .0944 respectively?
 .1412 and .0788?
 .1568 and .0632?

Accepted Answer

The answer of Given the following process control data for...

Question 6

What is the standard deviation of the sampling distribution of sample means?

Accepted Answer

A)  5 hours 
B)  6.67 hours 
C)  10 hours 
D)  11.55 hours 
E)  20 hours 
A)  5 hours 
B)  6.67 hours 
C)  10 hours 
D)  11.55 hours 
E)  20 hours

Question 7

Construct the appropriate control chart for the sample observations listed below,and determine if the process is in control using two sigma limits.

Accepted Answer

@#IMG-DLM& The initial value i

Question 8

Given the following process control data for a normally distributed quality variable (three samples of size four each):
  
-If the process is known to have a mean of 15 and a standard deviation of 3,using three sigma control limits,do any of the sample means indicate an out-of-control process mean?

Accepted Answer

No,all are

Question 9

Design specifications are equivalent to control limits.

Accepted Answer

A) True 
 B)False

Question 10

"Process capability" compares "process variability" to the "design specifications".

Accepted Answer

A) True 
 B)False

Question 11

What is the estimate of the standard deviation of the sampling distribution for an instructor's sample proportion of failures?

Accepted Answer

A)  .0075 
B)  .03 
C)  .075 
D)  .3 
E)  .75 
A)  .0075 
B)  .03 
C)  .075 
D)  .3 
E)  .75

Question 12

The amount of inspection can range from no inspection at all to inspecting each item numerous times.

Accepted Answer

A) True 
 B)False

Question 13

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)?

Accepted Answer

A)  0.0026 
B)  0.0456 
C)  0.3174 
D)  0.6826 
E)  0.9544 
A)  0.0026 
B)  0.0456 
C)  0.3174 
D)  0.6826 
E)  0.9544

Question 14

Using .95 control limits,(5% alpha risk),which instructor(s),if any,should he conclude is (are)out of control?

Accepted Answer

A) None of the choices are correct. 
B) Prof.B only 
C) Prof.D only 
D) Both Prof.B and Prof.D. 
E) All of the choices are correct. 
A) None of the choices are correct. 
B) Prof.B only 
C) Prof.D only 
D) Both Prof.B and Prof.D. 
E) All of the choices are correct.

Question 15

When a process is not centred,its capability should be based on Cpk because it considers the upper and lower design specifications separately and not just the overall design specification width.

Accepted Answer

A) True 
 B)False

Question 16

The frequency and quantity of inspection depends primarily on the cost of inspection.

Accepted Answer

A) True 
 B)False

Question 17

A control chart used to monitor the fraction of defectives generated by a process is the:

Accepted Answer

A)  p-chart. 
B)  R-chart. 
C)  x-bar chart. 
D)  c-chart. 
E)  Gantt chart. 
A)  p-chart. 
B)  R-chart. 
C)  x-bar chart. 
D)  c-chart. 
E)  Gantt chart.

Question 18

The sampling distribution of sample means taken from a process has less variability than the distribution of the process.

Accepted Answer

A) True 
 B)False

Question 19

A town's department of public works is concerned about adverse public reaction to a sewer project that is currently in progress.Because of this,the Commissioner of Public Works has authorized a weekly survey to be conducted of town residents.Each week,a sample of 100 residents is questioned on their feelings towards the project.The results to date are shown below.Analyze this data using an appropriate control chart with a 5% risk of Type I error.Is the community sentiment stable?

Accepted Answer

[Use a p-chart].
Since the sam

Question 20

The specifications for a product are 6 mm ±0.1 mm.The process is known to operate at a mean of 6.05 mm with a standard deviation of 0.01 mm.What is the Cpkfor this process?

Accepted Answer

A)  3.33 
B)  1.67 
C)  5.00 
D)  2.50 
E)  None of the choices are correct. 
A)  3.33 
B)  1.67 
C)  5.00 
D)  2.50 
E)  None of the choices are correct.

Exam 10: A: Statistical Quality Control

The six sigma quality improvement methodology is called:

What is the estimate of the mean proportion of failures,(p̅)for these instructors?

Control limits and process variability are directly related.

Typically the production of high-cost,low-volume items require little quality control inspection.

What is the standard deviation of the sampling distribution of sample means?

Construct the appropriate control chart for the sample observations listed below,and determine if the process is in control using two sigma limits.

Given the following process control data for a normally distributed quality variable (three samples of size four each): -If the process is known to have a mean of 15 and a standard deviation of 3,using three sigma control limits,do any of the sample means indicate an out-of-control process mean?

Design specifications are equivalent to control limits.

"Process capability" compares "process variability" to the "design specifications".

What is the estimate of the standard deviation of the sampling distribution for an instructor's sample proportion of failures?

The amount of inspection can range from no inspection at all to inspecting each item numerous times.

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)?

Using .95 control limits,(5% alpha risk),which instructor(s),if any,should he conclude is (are)out of control?

When a process is not centred,its capability should be based on Cpk because it considers the upper and lower design specifications separately and not just the overall design specification width.

The frequency and quantity of inspection depends primarily on the cost of inspection.

A control chart used to monitor the fraction of defectives generated by a process is the:

The sampling distribution of sample means taken from a process has less variability than the distribution of the process.

The specifications for a product are 6 mm ±0.1 mm.The process is known to operate at a mean of 6.05 mm with a standard deviation of 0.01 mm.What is the Cpkfor this process?

Introduction to Operations Management

Competitiveness, Strategic Planning, and Productivity

Demand Forecasting

A: Product Design

B: Product Design

A: Strategic Capacity Planning

B: Strategic Capacity Planning

A: Process Design and Facility Layout

B: Process Design and Facility Layout

A: Design of Work Systems

B: Design of Work Systems

A: Location Planning and Analysis

B: Location Planning and Analysis

Management of Quality

B: Statistical Quality Control

Supply Chain Management

Inventory Management

Aggregate Operations Planning

Material Requirements Planning and Enterprise Resource Planning

A: Just-In-Time and Lean Production

B: Just-In-Time and Lean Production

Job and Staff Scheduling

Project Management

A: Waiting-Line Analysis

B: Waiting-Line Analysis

Filters

When a process is not centred,its capability should be based on C_pk because it considers the upper and lower design specifications separately and not just the overall design specification width.