Question 1

Which of the following would be a "common" cause of variation?

Accepted Answer

A)  random sources 
B)  a machine in need of repair 
C)  an untrained worker 
D)  a defective raw material 
A)  random sources 
B)  a machine in need of repair 
C)  an untrained worker 
D)  a defective raw material A

Question 2

A laser eye surgery process has tolerances of plus or minus .001 inches. What does the process standard deviation need to be in order for this process to have a capability ratio of 1.33?

Accepted Answer

A)  0.025 inches 
B)  0.0015 inches 
C)  0.015 inches 
D)  0.00025 inches 
A)  0.025 inches 
B)  0.0015 inches 
C)  0.015 inches 
D)  0.00025 inches D

Question 3

The management of a line that fills cereal boxes wants the box filled at 32.2 ounces. When the process is in control, the standard deviation is .1 ounces.
a. Construct the upper and lower control limits for a 3-sigma x-bar chart using a sample size of five.
b. The results from the last 10 samples follow. Is the process in control?

Accepted Answer

UCL,LCL =   ± 3σ = 32.2 ±(3.1) = 32.5,31.9
 
The process is in control.

Question 4

A laser surgery process has tolerances of plus or minus .01 inches. What does the process standard deviation need to be in order for this process to have a capability ratio of 1.00?

Accepted Answer

A)  0.02 inches 
B)  0.0033 inches 
C)  0.002 inches 
D)  0.033 inches 
A)  0.02 inches 
B)  0.0033 inches 
C)  0.002 inches 
D)  0.033 inches

Question 5

Improving quality seems to be a strategic weapon in gaining market share. However, improving quality entails allocation of resources and effort. As greater effort is expended to stop defects before they occur, which one of the following costs increases?

Accepted Answer

A)  prevention costs 
B)  appraisal costs 
C)  internal failure costs 
D)  external failure costs 
A)  prevention costs 
B)  appraisal costs 
C)  internal failure costs 
D)  external failure costs

Question 6

A cost that is incurred if some aspect of a service must be performed again is called a(n):

Accepted Answer

A)  yield loss. 
B)  prevention cost. 
C)  appraisal cost. 
D)  rework cost. 
A)  yield loss. 
B)  prevention cost. 
C)  appraisal cost. 
D)  rework cost.

Question 7

________ is an internal cost of quality incurred when a process step must be performed again or fixed before an item can be shipped.

Accepted Answer

The answer of ________ is an internal cost of quality...

Question 8

The 15-year-old car didn't dazzle students or members of the opposite sex, but it started every morning and evening and got the professor to his destination on time, thereby scoring high on the:

Accepted Answer

A)  psychological impressions scale of quality. 
B)  fitness for use scale of quality. 
C)  support scale of quality. 
D)  bells and whistles scale of quality. 
A)  psychological impressions scale of quality. 
B)  fitness for use scale of quality. 
C)  support scale of quality. 
D)  bells and whistles scale of quality.

Question 9

A hotel tracks the number of complaints per month. When the process is in control, there is an average of 35 complaints per month. Assume that a 2-sigma control limit is used. What is the upper control limit?

Accepted Answer

A)  less than or equal to 35 
B)  more than 35 but less than or equal to 45 
C)  more than 45 but less than or equal to 55 
D)  more than 55 
A)  less than or equal to 35 
B)  more than 35 but less than or equal to 45 
C)  more than 45 but less than or equal to 55 
D)  more than 55

Question 10

A sampling plan is best for evaluating quality when: (1) Inspection costs are high
(2) Inspection costs are low
(3) Non-destructive testing is available
(4) Destructive testing is required

Accepted Answer

A)  1 and 3 
B)  1 and 4 
C)  2 and 3 
D)  2 and 4 
A)  1 and 3 
B)  1 and 4 
C)  2 and 3 
D)  2 and 4

Question 11

A company is interested in monitoring the variability in the weight of the fertilizer bags it produces. An appropriate control chart would be:

Accepted Answer

A)  $ \bar{x} $ chart. 
B)  a p-chart. 
C)  a c-chart. 
D)  an R-chart. 
A)  $ \bar{x} $ chart. 
B)  a p-chart. 
C)  a c-chart. 
D)  an R-chart.

Question 12

Which one of the following statements about quality control is True?

Accepted Answer

A)  Measurement by attributes is a simple yes or no decision. 
B)  Complete inspection is used when inspection cost is high. 
C)  Sampling inspection is used when the cost of passing a defective unit is high relative to the cost of inspection. 
D)  Measurement by variables is often used when the quality specifications are complex. 
A)  Measurement by attributes is a simple yes or no decision. 
B)  Complete inspection is used when inspection cost is high. 
C)  Sampling inspection is used when the cost of passing a defective unit is high relative to the cost of inspection. 
D)  Measurement by variables is often used when the quality specifications are complex.

Question 13

Discuss the situations under which each of the following charts would be best: $ \bar{x} $ chart, p-chart, and c-chart.

Accepted Answer

The @#LAT-DLM& chart is used to observe the mean o

Question 14

In acceptance sampling, the proportion defective that the buyer will allow in an incoming shipment is:

Accepted Answer

A)  the acceptable random sample (ARS). 
B)  the upper control limit (UCL). 
C)  the lower control limit (LCL). 
D)  the acceptable quality level (AQL). 
A)  the acceptable random sample (ARS). 
B)  the upper control limit (UCL). 
C)  the lower control limit (LCL). 
D)  the acceptable quality level (AQL).

Question 15

The Six Sigma five-step approach contains the elements define, measure, analyze, improve, and control.

Accepted Answer

A) True 
 B)False

Question 16

Table 5.11
Factors for Calculating Three-Sigma Limits for the $ \bar{x} $ 
 Chart and R-Chart
   
Source: 1950 ASTM Manual on Quality Control of Materials, copyright American Society for Testing Materials. Reprinted with permission.
-Construct a 3-sigma R-chart for the length in centimeters of a part from the following table. What is the upper control limit of your R-chart?

Accepted Answer

A)  .032 
B)  0.51 
C)  0.73 
D)  2.28 
A)  .032 
B)  0.51 
C)  0.73 
D)  2.28

Question 17

An example of an internal failure cost would be warranty cost.

Accepted Answer

A) True 
 B)False

Question 18

One of the principles that total quality management (TQM) stresses is customer satisfaction.

Accepted Answer

A) True 
 B)False

Question 19

At which of the following steps will the cost of detecting product defects be the highest?

Accepted Answer

A)  customer 
B)  process 
C)  final testing 
D)  raw material 
A)  customer 
B)  process 
C)  final testing 
D)  raw material

Question 20

The defect rate for a product has historically been about 7.0%. What is the upper control chart limit if you wish to use a sample size of 20 and 3-sigma limits?

Accepted Answer

A)  0.186 
B)  0.203 
C)  0.222 
D)  0.241 
A)  0.186 
B)  0.203 
C)  0.222 
D)  0.241

Exam 3: Quality and Performance

Which of the following would be a "common" cause of variation?

A laser eye surgery process has tolerances of plus or minus .001 inches. What does the process standard deviation need to be in order for this process to have a capability ratio of 1.33?

A laser surgery process has tolerances of plus or minus .01 inches. What does the process standard deviation need to be in order for this process to have a capability ratio of 1.00?

Improving quality seems to be a strategic weapon in gaining market share. However, improving quality entails allocation of resources and effort. As greater effort is expended to stop defects before they occur, which one of the following costs increases?

A cost that is incurred if some aspect of a service must be performed again is called a(n):

________ is an internal cost of quality incurred when a process step must be performed again or fixed before an item can be shipped.

The 15-year-old car didn't dazzle students or members of the opposite sex, but it started every morning and evening and got the professor to his destination on time, thereby scoring high on the:

A hotel tracks the number of complaints per month. When the process is in control, there is an average of 35 complaints per month. Assume that a 2-sigma control limit is used. What is the upper control limit?

A sampling plan is best for evaluating quality when: (1) Inspection costs are high (2) Inspection costs are low (3) Non-destructive testing is available (4) Destructive testing is required

A company is interested in monitoring the variability in the weight of the fertilizer bags it produces. An appropriate control chart would be:

Which one of the following statements about quality control is True?

Discuss the situations under which each of the following charts would be best: xˉ \bar{x} xˉ chart, p-chart, and c-chart.

In acceptance sampling, the proportion defective that the buyer will allow in an incoming shipment is:

The Six Sigma five-step approach contains the elements define, measure, analyze, improve, and control.

An example of an internal failure cost would be warranty cost.

One of the principles that total quality management (TQM) stresses is customer satisfaction.

At which of the following steps will the cost of detecting product defects be the highest?

The defect rate for a product has historically been about 7.0%. What is the upper control chart limit if you wish to use a sample size of 20 and 3-sigma limits?

Using Operations to Create Value

Process Strategy and Analysis

Capacity Planning

Constraint Management

Lean Systems

Project Management

Forecasting

Inventory Management

Operations Planning and Scheduling

Resource Planning

Supply Chain Design

Supply Chain Logistic Networks

Supply Chain Integration

Supply Chain Sustainability

Supplement A Decision Making

Supplement J Operations Scheduling

Supplement K Layout

Supplement B Waiting Lines

Supplement C Special Inventory Models

Supplement D Linear Programming

Supplement E Simulation

Supplement F Financial Analysis

Supplement G Acceptance Sampling Plans

Supplement H Measuring Output Rates

Supplement I Learning Curve Analysis

Filters

Discuss the situations under which each of the following charts would be best: $\bar{x}$ chart, p-chart, and c-chart.