Question 1

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 2

Tolerances represent the control limits we use on the charts.

Accepted Answer

A) True 
 B)False

Question 3

A lower control limit must by definition be a value less than an upper control limit.

Accepted Answer

A) True 
 B)False

Question 4

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 control charts that would provide for a 5% risk of Type I error.

Accepted Answer

The answer of A town's department of public works is...

Question 5

The Taguchi Cost Function suggests that the capability ratio can be improved by extending the spread between LCL and UCL.

Accepted Answer

A) True 
 B)False

Question 6

If the process proportion of defectives is unknown, using .10 alpha risk control limits, do any of the sample proportions indicate an out-of-control process proportion of defectives?

Accepted Answer

The answer of If the process proportion of defectives is...

Question 7

An operator collected the following time series data from a process:

Accepted Answer

@#IMG-DLM& (A) Determine the number of A

Question 8

Statistical Process Control is the measurement of rejects in the final product.

Accepted Answer

A) True 
 B)False

Question 9

The primary purpose of statistical process control is to detect a defective product before it is shipped to a customer.

Accepted Answer

A) True 
 B)False

Question 10

The number of runs with respect to the sample median is:

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) none of these 
A) 2 
B) 3 
C) 4 
D) 5 
E) none of these

Question 11

Construct the appropriate two-sigma control chart for the sample observations listed below.

Accepted Answer

The answer of Construct the appropriate two-sigma control chart for...

Question 12

Control limits used on process control charts are specifications established by design or customers.

Accepted Answer

A) True 
 B)False

Question 13

What is the estimate of the sample average range based upon this limited sample?

Accepted Answer

A) 13.0 
B) 4.33 
C) 5.4 
D) 4.2 
E) 2.0 
A) 13.0 
B) 4.33 
C) 5.4 
D) 4.2 
E) 2.0

Question 14

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 15

The amount of inspection needed is governed by the costs of inspection and the expected costs of passing defective items.

Accepted Answer

A) True 
 B)False

Question 16

If the process proportion of defectives is unknown, what is the estimate of it?

Accepted Answer

The answer of If the process proportion of defectives is...

Question 17

What is the sample proportion of defectives for sample #1? #2? #3?

Accepted Answer

The answer of What is the sample proportion of defectives...

Question 18

The number of runs with respect to 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 19

What is the sample mean service life for sample 2?

Accepted Answer

A) 460 hours 
B) 495 hours 
C) 500 hours 
D) 515 hours 
E) 525 hours 
A) 460 hours 
B) 495 hours 
C) 500 hours 
D) 515 hours 
E) 525 hours

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 10: Quality Control

The purpose of control charts is to:

Tolerances represent the control limits we use on the charts.

A lower control limit must by definition be a value less than an upper control limit.

The Taguchi Cost Function suggests that the capability ratio can be improved by extending the spread between LCL and UCL.

If the process proportion of defectives is unknown, using .10 alpha risk control limits, do any of the sample proportions indicate an out-of-control process proportion of defectives?

An operator collected the following time series data from a process:

Statistical Process Control is the measurement of rejects in the final product.

The primary purpose of statistical process control is to detect a defective product before it is shipped to a customer.

The number of runs with respect to the sample median is:

Construct the appropriate two-sigma control chart for the sample observations listed below.

Control limits used on process control charts are specifications established by design or customers.

What is the estimate of the sample average range based upon this limited sample?

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

The amount of inspection needed is governed by the costs of inspection and the expected costs of passing defective items.

If the process proportion of defectives is unknown, what is the estimate of it?

What is the sample proportion of defectives for sample #1? #2? #3?

The number of runs with respect to the sample median is:

What is the sample mean service life for sample 2?

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

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