Question 1

Tolerances and specifications limits report similar information for a given product design.

Accepted Answer

A) True 
 B)False  True

Question 2

Possible root causes of special cause variation include all of the following except:

Accepted Answer

A) operator error 
B) process out of adjustments 
C) over producing 
D) defective materials 
A) operator error 
B) process out of adjustments 
C) over producing 
D) defective materials C

Question 3

A sequence of sample points that display a pattern is known as a run.

Accepted Answer

A) True 
 B)False  True

Question 4

Using Excel to construct control charts should be avoided because most people believe using software results in too many errors.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following control charts are often based on sample sizes larger than one hundred?

Accepted Answer

A) xbar 
B) R 
C) c 
D) p 
A) xbar 
B) R 
C) c 
D) p

Question 6

In general,a process is considered to be in control for all the following conditions except

Accepted Answer

A) no points are outside the control limits 
B) all points are above the centerline 
C) the points are randomly distributed following a normal population 
D) no pattern exists in the plotted points no evidence of a run) 
A) no points are outside the control limits 
B) all points are above the centerline 
C) the points are randomly distributed following a normal population 
D) no pattern exists in the plotted points no evidence of a run)

Question 7

A company randomly selects 100 light bulbs every day for 40 days from its production process.If 600 defective light bulbs are found in the sampled bulbs then the 3-sigma lower control limit would be

Accepted Answer

A) 0.0357 
B) 0.0429 
C) 0.15 
D) 0.1857 
A) 0.0357 
B) 0.0429 
C) 0.15 
D) 0.1857

Question 8

If a sample of 40 units of output found 500 defects,then the center line for monitoring the average number of defects per unit of output would be

Accepted Answer

A) 
 = 40 
B) 
 = 0)08 
C) 
 = 12.5 
D) 
 = 20,000 
A) 
 = 40 
B) 
 = 0)08 
C) 
 = 12.5 
D) 
 = 20,000

Question 9

A company manufactures a product that has a design nominal)target width of 5 inches with tolerances of   inch.The process that produces the product has a mean of 4.995 inches and a standard deviation of 0.01 inch.The process capability index for this process is

Accepted Answer

A) 1.67 
B) 1.5 
C) -1.5 
D) -1.67 
A) 1.67 
B) 1.5 
C) -1.5 
D) -1.67

Question 10

Process control charts are rarely useful for monitoring and controlling the output of service processes.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following statements is TRUE?

Accepted Answer

A) With wider control limits larger Z),the process is more likely to be in control. 
B) With narrower control limits,smaller Z),the process is more likely to be in control. 
C) With wider control limits larger Z),the process is less likely to be in control. 
D) none of the above are true. 
A) With wider control limits larger Z),the process is more likely to be in control. 
B) With narrower control limits,smaller Z),the process is more likely to be in control. 
C) With wider control limits larger Z),the process is less likely to be in control. 
D) none of the above are true.

Question 12

A process capability ratio greater than one shows that a process is capable of producing output within its specification limits.

Accepted Answer

A) True 
 B)False

Question 13

A process that is determined to be in control contains no variation.

Accepted Answer

A) True 
 B)False

Question 14

After special cause variation is detected,the focus changes to identifying the root cause of the variation and eliminating it.

Accepted Answer

A) True 
 B)False

Question 15

If the quality of a process's output is determined by the average value of a sample,use an)___________control chart.

Accepted Answer

A) xbar 
B) R 
C) c 
D) p 
A) xbar 
B) R 
C) c 
D) p

Question 16

To monitor the number of blemishes on a polished surface a company randomly selects 10 units of output from its process and counts the number of blemishes on each unit.The sample results are shown below
 
Given the sample information above,the average number of defects per unit for this process would be

Accepted Answer

A) 160 
B) 80 
C) 16 
D) 10 
A) 160 
B) 80 
C) 16 
D) 10

Question 17

To monitor the number of blemishes on a polished surface a company randomly selects 10 units of output from its process and counts the number of blemishes on each unit.The sample results are shown below
 
Given the sample information above,the standard deviation of the number of defects for this process would be

Accepted Answer

A) 16 
B) 10 
C) 4 
D) 0 
A) 16 
B) 10 
C) 4 
D) 0

Question 18

A process capability ratio reflects the number of Z)sigmas included in the range between the upper and lower control limits.

Accepted Answer

A) True 
 B)False

Question 19

Variable control charts are used for quantitative measures such as weight or time.

Accepted Answer

A) True 
 B)False

Question 20

When monitoring a process's output with a quantitative variable either an R-chart or an   -)chart is used,but never both.

Accepted Answer

A) True 
 B)False

Exam 3: Statistical Quality Control

Tolerances and specifications limits report similar information for a given product design.

Possible root causes of special cause variation include all of the following except:

A sequence of sample points that display a pattern is known as a run.

Using Excel to construct control charts should be avoided because most people believe using software results in too many errors.

Which of the following control charts are often based on sample sizes larger than one hundred?

In general,a process is considered to be in control for all the following conditions except

A company randomly selects 100 light bulbs every day for 40 days from its production process.If 600 defective light bulbs are found in the sampled bulbs then the 3-sigma lower control limit would be

If a sample of 40 units of output found 500 defects,then the center line for monitoring the average number of defects per unit of output would be

A company manufactures a product that has a design nominal)target width of 5 inches with tolerances of inch.The process that produces the product has a mean of 4.995 inches and a standard deviation of 0.01 inch.The process capability index for this process is

Process control charts are rarely useful for monitoring and controlling the output of service processes.

Which of the following statements is TRUE?

A process capability ratio greater than one shows that a process is capable of producing output within its specification limits.

A process that is determined to be in control contains no variation.

After special cause variation is detected,the focus changes to identifying the root cause of the variation and eliminating it.

If the quality of a process's output is determined by the average value of a sample,use an)___________control chart.

A process capability ratio reflects the number of Z)sigmas included in the range between the upper and lower control limits.

Variable control charts are used for quantitative measures such as weight or time.

When monitoring a process's output with a quantitative variable either an R-chart or an -)chart is used,but never both.

Operations Management

Quality Management

Product Design

Service Design

Processes and Technology

Scheduling

Capacity and Facilities

Human Resources

Project Management

Supply Chain Management: Strategy and Design

Global Supply Chain Procurement and Distribution

Forecasting

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Operational Decision-Making Tools: Simulation

Operational Decision-Making Tools: Linear Programming

The Sales and Operations Planning Process

Resource Planning

Lean Systems

Operational Decision-Making Tools: Decision Analysis

Operational Decision-Making Tools: Acceptance Sampling

Decision-Making Tools: Facility Location Models

Operational Decision-Making Tools: Work Measurement

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