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 based on standard deviations rather than range values. 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 based on standard deviations rather than range values.

Exam 26: Statistical Process Control

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 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)

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Question 41

Define consumer's risk. How does it relate to the errors of hypothesis testing? What is the symbol for its value?

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Question 42

The defect rate for a product has historically been about 1.6%. What are the upper and lower control chart limits for a p-chart, if you wish to use a sample size of 100 and 3-sigma limits?

(Essay)

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Question 43

Which of the following statements on acceptance sampling is true?

(Multiple Choice)

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Question 44

Up to three standard deviations above or below the centerline is the amount of variation that statistical process control allows for

(Multiple Choice)

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Question 45

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

(Multiple Choice)

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Question 46

What is the difference between the process capability ratio C_p and the process capability index C_pk?

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Question 47

What are the three possible results (or findings) from the use of control charts?

(Essay)

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Question 48

Which of the following is true regarding the process capability index C_pk?

(Multiple Choice)

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Question 49

Average outgoing quality (AOQ) usually

(Multiple Choice)

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Question 50

A manager wishes to build a 3-sigma range chart for a process. The sample size is five, the mean of sample means is 16.01, and the average range is 5.3. From Table S6.1 in the text, the appropriate value of D₃ is 0, and D₄ is 2.115. The UCL and LCL for this range chart are

(Multiple Choice)

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Question 51

If $\bar x$ = 23 ounces, ? = 0.4 ounces, and n = 16, the ±3? control limits will be

(Multiple Choice)

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Question 52

Acceptance sampling

(Multiple Choice)

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Question 53

The mean and standard deviations for a process are μ = 90 and σ = 9. For the variable control chart, a sample size of 16 will be used. Calculate the standard deviation of the sampling distribution.

(Essay)

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Question 54

In the table below are selected values for the OC curve for the acceptance sampling plan n = 210, c = 6. Upon failed inspection, defective items are replaced. Calculate the AOQ for each data point. (You may assume that the population is much larger than the sample.) Plot the AOQ curve. At approximately what population defective rate is the AOQ at its worst? Explain how this happens. How well does this plan meet the specifications of AQL = 0.015, α = 0.05; LTPD = 0.05, β = 0.10? Discuss. Population percent defective Probability of acceptance 0.00 1.00000 0.01 0.99408 0.02 0.86650 0.03 0.55623 0.04 0.26516 0.05 0.10056 0.06 0.03217 0.07 0.00905 0.08 0.00231 0.09 0.00054 0.10 0.00012

(Essay)

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Question 55

Why doesn't acceptance sampling remove all defects from a batch?

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Question 56

Producer's risk is the probability of

(Multiple Choice)

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Question 57

The mean and standard deviation for a process for which we have a substantial history are μ = 120 and σ = 2. For the x-bar chart, a sample size of 16 will be used. What is the mean of the sampling distribution?

(Multiple Choice)

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Question 58

A C_pk index of 1.00 equates to a defect rate of

(Multiple Choice)

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Question 59

Which of the following is true about cutting costs at Canada Bankers Life Assurance Company?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 166

Exam 26: Statistical Process Control

Define consumer's risk. How does it relate to the errors of hypothesis testing? What is the symbol for its value?

The defect rate for a product has historically been about 1.6%. What are the upper and lower control chart limits for a p-chart, if you wish to use a sample size of 100 and 3-sigma limits?

Which of the following statements on acceptance sampling is true?

Up to three standard deviations above or below the centerline is the amount of variation that statistical process control allows for

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

What is the difference between the process capability ratio Cp and the process capability index Cpk?

What are the three possible results (or findings) from the use of control charts?

Which of the following is true regarding the process capability index Cpk?

Average outgoing quality (AOQ) usually

A manager wishes to build a 3-sigma range chart for a process. The sample size is five, the mean of sample means is 16.01, and the average range is 5.3. From Table S6.1 in the text, the appropriate value of D3 is 0, and D4 is 2.115. The UCL and LCL for this range chart are

If xˉ\bar xxˉ = 23 ounces, ? = 0.4 ounces, and n = 16, the ±3? control limits will be

Acceptance sampling

The mean and standard deviations for a process are μ = 90 and σ = 9. For the variable control chart, a sample size of 16 will be used. Calculate the standard deviation of the sampling distribution.

Why doesn't acceptance sampling remove all defects from a batch?

Producer's risk is the probability of

The mean and standard deviation for a process for which we have a substantial history are μ = 120 and σ = 2. For the x-bar chart, a sample size of 16 will be used. What is the mean of the sampling distribution?

A Cpk index of 1.00 equates to a defect rate of

Which of the following is true about cutting costs at Canada Bankers Life Assurance Company?

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy and Sustainability

Location Strategies

Layout Strategies

Human Resources, Job Design, and Work Measurement

Supply-Chain Management

Inventory Management

Aggregate Planning

Material Requirements Planning Mrp and Erp

Short-Term Scheduling

Lean Operations

Maintenance and Reliability

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Supply Chain Management Analytics

Sustainability in the Supply Chain

Capacity and Constraint Management

Filters

What is the difference between the process capability ratio C_p and the process capability index C_pk?

Which of the following is true regarding the process capability index C_pk?

A manager wishes to build a 3-sigma range chart for a process. The sample size is five, the mean of sample means is 16.01, and the average range is 5.3. From Table S6.1 in the text, the appropriate value of D₃ is 0, and D₄ is 2.115. The UCL and LCL for this range chart are

If $\bar x$ = 23 ounces, ? = 0.4 ounces, and n = 16, the ±3? control limits will be

A C_pk index of 1.00 equates to a defect rate of