A) is the application of statistical techniques to the control of processes. B) was developed by Walter Shewhart of Bell Laboratories. C) is used to determine whether to accept or reject a lot of material based on the evaluation of a sample. D) separates the natural and assignable causes of variation. E) is another name for 100% inspection. A) is the application of statistical techniques to the control of processes. B) was developed by Walter Shewhart of Bell Laboratories. C) is used to determine whether to accept or reject a lot of material based on the evaluation of a sample. D) separates the natural and assignable causes of variation. E) is another name for 100% inspection.

A) affect almost every production process. B) are the many sources of variation that occur when a process is under control. C) when grouped,form a pattern,or distribution. D) are tolerated,within limits,when a process is under control. E) All of the above are true. A) affect almost every production process. B) are the many sources of variation that occur when a process is under control. C) when grouped,form a pattern,or distribution. D) are tolerated,within limits,when a process is under control. E) All of the above are true.

Exam 20: Statistical Process Control

A process that is assumed to be in control with limits of 89 ± 2 had sample averages for the x-bar chart of the following: 87.1,87,87.2,89,90,88.5,89.5,and 88.Is the process in control?

(Multiple Choice)

4.8/5

(30)

Question 21

Acceptance sampling:

(Multiple Choice)

4.7/5

(27)

Question 22

Under which of the following situations will the average outgoing quality (AOQ)decrease?

(Multiple Choice)

4.8/5

(29)

Question 23

If = 23 ounces,σ = 0.4 ounces,and n = 16,what will be the ±3σ control limits for the x-bar chart?

(Multiple Choice)

4.8/5

(35)

Question 24

A part that connects two levels should have a distance between the two holes of 4".It has been determined that x-bar and R-charts should be set up to determine if the process is in statistical control.The following ten samples of size four were collected.Calculate the control limits,plot the control charts,and determine if the process is in control.

(Essay)

4.8/5

(39)

Question 25

The Cpk index measures the difference between the desired and actual dimensions of goods or services produced.

(True/False)

4.9/5

(43)

Question 26

A bank's manager has videotaped 20 different teller transactions to observe the number of mistakes being made.Ten transactions had no mistakes,five had one mistake and five had two mistakes.Compute proper control limits at the 90% confidence level.

(Essay)

4.9/5

(38)

Question 27

Define consumer's risk.Is it a Type I or Type II error? What is the symbol for its value?

(Essay)

4.7/5

(33)

Question 28

The specification for a plastic liner for concrete highway projects calls for a thickness of 6.0 mm ± 0.1 mm.The standard deviation of the process is estimated to be 0.02 mm.What are the upper and lower specification limits for this product? The process is known to operate at a mean thickness of 6.03 mm.What is the Cp and Cpk for this process? About what percent of all units of this liner will meet specifications?

(Essay)

4.9/5

(44)

Question 29

A process is said to be in statistical control when assignable causes are the only sources of variation.

(True/False)

4.8/5

(35)

Question 30

A Cpk index of 1.00 equates to what defect rate?

(Multiple Choice)

4.8/5

(32)

Question 31

A department chair wants to monitor the percentage of failing students in classes in her department.Each class had an enrollment of 50 students last spring.The number of failing students in the 10 classes offered that term were 1,4,2,0,0,0,0,0,0,and 3,respectively.Compute the control limits for a p-chart at the 95% confidence level.Is the process in control?

(Essay)

4.9/5

(35)

Question 32

If μ = 9 ounces,σ = 0.5 ounces,and n = 9,calculate the 3-sigma control limits for the x-bar chart.

(Short Answer)

4.9/5

(38)

Question 33

The statistical definition of Six Sigma allows for 3.4 defects per million.This is achieved by what Cpk index value?

(Multiple Choice)

4.7/5

(40)

Question 34

For a 3-sigma x-bar chart where the process standard deviation is known,the upper control limit:

(Multiple Choice)

4.8/5

(27)

Question 35

An operating characteristics curve shows:

(Multiple Choice)

5.0/5

(32)

Question 36

The x-bar chart indicates that a gain or loss of uniformity has occurred in dispersion of a production process.

(True/False)

4.9/5

(44)

Question 37

Producer's risk is the probability of:

(Multiple Choice)

4.8/5

(45)

Question 38

Natural variations:

(Multiple Choice)

4.8/5

(39)

Question 39

The local newspaper receives several complaints per day about typographic errors.Over a seven-day period,the publisher has received calls from readers reporting the following total daily number of errors: 4,3,2,6,7,3,and 9.Based on these data alone,what type of control chart(s)should the publisher use?

(Multiple Choice)

5.0/5

(37)

Question 40

Showing 21 - 40 of 144

Exam 20: Statistical Process Control

A process that is assumed to be in control with limits of 89 ± 2 had sample averages for the x-bar chart of the following: 87.1,87,87.2,89,90,88.5,89.5,and 88.Is the process in control?

Acceptance sampling:

Under which of the following situations will the average outgoing quality (AOQ)decrease?

If = 23 ounces,σ = 0.4 ounces,and n = 16,what will be the ±3σ control limits for the x-bar chart?

The Cpk index measures the difference between the desired and actual dimensions of goods or services produced.

A bank's manager has videotaped 20 different teller transactions to observe the number of mistakes being made.Ten transactions had no mistakes,five had one mistake and five had two mistakes.Compute proper control limits at the 90% confidence level.

Define consumer's risk.Is it a Type I or Type II error? What is the symbol for its value?

A process is said to be in statistical control when assignable causes are the only sources of variation.

A Cpk index of 1.00 equates to what defect rate?

If μ = 9 ounces,σ = 0.5 ounces,and n = 9,calculate the 3-sigma control limits for the x-bar chart.

The statistical definition of Six Sigma allows for 3.4 defects per million.This is achieved by what Cpk index value?

For a 3-sigma x-bar chart where the process standard deviation is known,the upper control limit:

An operating characteristics curve shows:

The x-bar chart indicates that a gain or loss of uniformity has occurred in dispersion of a production process.

Producer's risk is the probability of:

Natural variations:

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy

Capacity and Constraint Management

Location Strategies

Layout Strategies

Human Resources, job Design, and Work Measurement

Supply Chain Management

Inventory Management

Aggregate Planning and Sop

Material Requirements Planning Mrpand Erp

Short-Term Scheduling

Jit, tps, and Lean Operations

Maintenance and Reliability

Sustainability in the Supply Chain

Supply Chain Management Analytics

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Filters