Question 1

A control chart used to monitor the number of defects per unit 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 D

Question 2

An analyst has gathered data and counted the number of runs with respect to the median.There were 60 observations and 22 runs.What can the analyst conclude given this information?

Accepted Answer

The expected number of above/below runs would be

Question 3

An x-bar control chart can only be valid if the underlying population it measures is a normal distribution.

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the following relationships must always be incorrect?

Accepted Answer

A) Tolerances > process variability > control limits B) Process variability > tolerances > control limits C) Tolerances > control limits > process variability D) Process variability > control limits > tolerances E) Process variability process variability > control limits B) Process variability > tolerances > control limits C) Tolerances > control limits > process variability D) Process variability > control limits > tolerances E) Process variability

Question 5

A p-chart is used to monitor the fraction of defectives in the output of a process.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?

Accepted Answer

A) mean 
B) variance 
C) standard deviation 
D) range 
E) proportion 
A) mean 
B) variance 
C) standard deviation 
D) range 
E) proportion

Question 7

A shift in the process mean for a measured characteristic would most likely be detected by a:

Accepted Answer

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

Question 8

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.

Accepted Answer

A) 67% 
B) 92% 
C) 33% 
D) .03% 
E) 5% 
A) 67% 
B) 92% 
C) 33% 
D) .03% 
E) 5%

Question 9

Attribute data are counted, variable data are measured.

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A) none 
B) Prof.B 
C) Prof.D 
D) both Prof.B and Prof.D 
E) all 
A) none 
B) Prof.B 
C) Prof.D 
D) both Prof.B and Prof.D 
E) all

Question 11

Approving the effort that occurs during the production process is known as acceptance sampling.

Accepted Answer

A) True 
 B)False

Question 12

The best way to assure quality is to use extensive inspection and control charts.

Accepted Answer

A) True 
 B)False

Question 13

What is the estimate of the standard deviation of the sampling distribution of sample proportions for whenever this process is under control?

Accepted Answer

A) .016 
B) .00016 
C) .04 
D) .0044 
E) .00002 
A) .016 
B) .00016 
C) .04 
D) .0044 
E) .00002

Question 14

If the process is known to produce 11 percent defectives on average, what is the mean of the sampling distribution of sample proportions for whenever this process is under control? The standard deviation?

Accepted Answer

The answer of If the process is known to produce...

Question 15

For upper and lower control limits of 23.29 and 16.71, which machine(s), if any, appear(s) to have an out-of-control process mean?

Accepted Answer

A) machine #1 
B) machine #2 
C) machine #3 
D) all of the machines 
E) none of the machines 
A) machine #1 
B) machine #2 
C) machine #3 
D) all of the machines 
E) none of the machines

Question 16

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?

Accepted Answer

A) 3.33 
B) 1.67 
C) 0.83 
D) 2.50 
E) none of the above 
A) 3.33 
B) 1.67 
C) 0.83 
D) 2.50 
E) none of the above

Question 17

What is the mean of the sampling distribution of sample means when this process is under control?

Accepted Answer

A) 18 ounces 
B) 19 ounces 
C) 20 ounces 
D) 21 ounces 
E) 22 ounces 
A) 18 ounces 
B) 19 ounces 
C) 20 ounces 
D) 21 ounces 
E) 22 ounces

Question 18

High-cost, low-volume items often require careful inspection since we make them so infrequently.

Accepted Answer

A) True 
 B)False

Question 19

A control chart used to monitor the process mean 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 20

What is the sample mean for sample #1? #2? #3?

Accepted Answer

The answer of What is the sample mean for sample...

Exam 10: Quality Control

A control chart used to monitor the number of defects per unit is the:

An analyst has gathered data and counted the number of runs with respect to the median.There were 60 observations and 22 runs.What can the analyst conclude given this information?

An x-bar control chart can only be valid if the underlying population it measures is a normal distribution.

Which of the following relationships must always be incorrect?

A p-chart is used to monitor the fraction of defectives in the output of a process.

Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?

A shift in the process mean for a measured characteristic would most likely be detected by a:

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.

Attribute data are counted, variable data are measured.

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

Approving the effort that occurs during the production process is known as acceptance sampling.

The best way to assure quality is to use extensive inspection and control charts.

What is the estimate of the standard deviation of the sampling distribution of sample proportions for whenever this process is under control?

If the process is known to produce 11 percent defectives on average, what is the mean of the sampling distribution of sample proportions for whenever this process is under control? The standard deviation?

For upper and lower control limits of 23.29 and 16.71, which machine(s), if any, appear(s) to have an out-of-control process mean?

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?

What is the mean of the sampling distribution of sample means when this process is under control?

High-cost, low-volume items often require careful inspection since we make them so infrequently.

A control chart used to monitor the process mean is the:

What is the sample mean for sample #1? #2? #3?

Introduction to Operations Management

Competitiveness, Strategy, and Productivity

Forecasting

Product and Service Design

Strategic Capacity Planning for Products and Services

Process Selection and Facility Layout

Work Design and Measurement

Location Planning and Analysis

Management of Quality

Aggregate Planning and Master Scheduling

MRP and ERP

Inventory Management

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Extension 4: Reliability

Extension 5: Decision Theory

Extension 7: Learning Curves

Extension 8: The Transportation Model

Extension 10: Acceptance Sampling

Extension 14: Maintenance

Filters