Question 1

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is Cpk.

Accepted Answer

A) True 
 B)False  True

Question 2

Range charts and p-charts are both used for variable data.

Accepted Answer

A) True 
 B)False  False

Question 3

The specification limits for a product are 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) 1.33 
A) 3.33 
B) 1.67 
C) 0.83 
D) 2.50 
E) 1.33 C

Question 4

A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with

Accepted Answer

A) p-charts. 
B) c-charts. 
C) x-bar charts. 
D) R-charts. 
E) o-charts. 
A) p-charts. 
B) c-charts. 
C) x-bar charts. 
D) R-charts. 
E) o-charts.

Question 5

Tolerances represent the control limits we use on the charts.

Accepted Answer

A) True 
 B)False

Question 6

Statistical process control charts are not really used to fix quality so much as they are used to

Accepted Answer

A) highlight when processes are not capable. 
B) point out when random variation is present. 
C) alert when corrective action is needed. 
D) monitor the quality of incoming shipments or outgoing finished goods. 
E) initiate team-building exercises. 
A) highlight when processes are not capable. 
B) point out when random variation is present. 
C) alert when corrective action is needed. 
D) monitor the quality of incoming shipments or outgoing finished goods. 
E) initiate team-building exercises.

Question 7

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.

Question 8

The purpose of control charts is to

Accepted Answer

A) estimate the proportion of output that is acceptable. 
B) weed out defective items. 
C) determine if the output is within tolerances/specifications. 
D) distinguish between random variation and assignable variation in the process. 
E) provide meaningful work for quality inspectors. 
A) estimate the proportion of output that is acceptable. 
B) weed out defective items. 
C) determine if the output is within tolerances/specifications. 
D) distinguish between random variation and assignable variation in the process. 
E) provide meaningful work for quality inspectors.

Question 9

Control limits are based on multiples of the process standard deviation.

Accepted Answer

A) True 
 B)False

Question 10

The purpose of statistical process control is to ensure that historical output is random.

Accepted Answer

A) True 
 B)False

Question 11

Consider the following information
 
The number of runs above and below the sample median is:

Accepted Answer

A) 3. 
B) 4. 
C) 5. 
D) 6. 
E) none of these. 
A) 3. 
B) 4. 
C) 5. 
D) 6. 
E) none of these.

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results
 
What is the sample mean for machine #1?

Accepted Answer

A) 15 
B) 16 
C) 17 
D) 21 
E) 23 
A) 15 
B) 16 
C) 17 
D) 21 
E) 23

Question 14

The traditional view is that the optimum level of inspection occurs when we catch at least 98.6 percent of the defects.

Accepted Answer

A) True 
 B)False

Question 15

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
 
What is the standard deviation of the sampling distribution of sample means for whenever service life is in control?

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 16

If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.

Accepted Answer

A) True 
 B)False

Question 17

Acceptance sampling, when it is used, is used
(I)before production.(II)during production.(III)after production.

Accepted Answer

A) I only 
B) I and III only 
C) I and II only 
D) II and III only 
E) I, II, and III 
A) I only 
B) I and III only 
C) I and II only 
D) II and III only 
E) I, II, and III

Question 18

Attributes need to be measured, whereas variable data can be counted.

Accepted Answer

A) True 
 B)False

Question 19

A time-ordered plot of sample statistics is called a(n)_____ chart.

Accepted Answer

A) statistical 
B) inspection 
C) control 
D) simo 
E) limit 
A) statistical 
B) inspection 
C) control 
D) simo 
E) limit

Question 20

Inspection is a(n)_____ activity.

Accepted Answer

A) prevention. 
B) capability analysis. 
C) flawless 
D) corrective. 
E) appraisal. 
A) prevention. 
B) capability analysis. 
C) flawless 
D) corrective. 
E) appraisal.

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is C_pk.

Range charts and p-charts are both used for variable data.

The specification limits for a product are 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, C_pk?

A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with

Tolerances represent the control limits we use on the charts.

Statistical process control charts are not really used to fix quality so much as they are used to

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

The purpose of control charts is to

Control limits are based on multiples of the process standard deviation.

The purpose of statistical process control is to ensure that historical output is random.

Consider the following information The number of runs above and below the sample median is:

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

The traditional view is that the optimum level of inspection occurs when we catch at least 98.6 percent of the defects.

If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.

Acceptance sampling, when it is used, is used (I)before production.(II)during production.(III)after production.

Attributes need to be measured, whereas variable data can be counted.

A time-ordered plot of sample statistics is called a(n)_____ chart.

Inspection is a(n)_____ activity.

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

Inventory Management

MRP and ERP

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Filters

Exam 10: Quality Control

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is Cpk.

Range charts and p-charts are both used for variable data.

The specification limits for a product are 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?

A process results in a few defects occurring in each unit of output. Long-run, these defects should be monitored with

Tolerances represent the control limits we use on the charts.

Statistical process control charts are not really used to fix quality so much as they are used to

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

The purpose of control charts is to

Control limits are based on multiples of the process standard deviation.

The purpose of statistical process control is to ensure that historical output is random.

Consider the following information The number of runs above and below the sample median is:

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

The traditional view is that the optimum level of inspection occurs when we catch at least 98.6 percent of the defects.

If a point on a control chart falls outside one of the control limits, this suggests that the process output is nonrandom and should be investigated.

Acceptance sampling, when it is used, is used (I)before production.(II)during production.(III)after production.

Attributes need to be measured, whereas variable data can be counted.

A time-ordered plot of sample statistics is called a(n)_____ chart.

Inspection is a(n)_____ activity.

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

Inventory Management

MRP and ERP

Jit and Lean Operations

Supply Chain Management

Scheduling

Project Management

Management of Waiting Lines

Linear Programming

Filters

When a process is not centered, its capability is measured in a slightly different way. The symbol for this case is C_pk.

The specification limits for a product are 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, C_pk?