Question 1

A Type I error occurs when

Accepted Answer

A) a good lot is rejected. 
B) a bad lot is accepted. 
C) the number of defectives is very large. 
D) the population is worse than the AQL. 
E) a good lot is accepted. 
A) a good lot is rejected. 
B) a bad lot is accepted. 
C) the number of defectives is very large. 
D) the population is worse than the AQL. 
E) a good lot is accepted.

Question 2

An x-bar control chart was examined and no data points fell outside of the limits.Can this process be considered in control?

Accepted Answer

A) No,there could be a pattern to the points,the R-chart must be checked. 
B) Yes,it is unlikely that there is a pattern in these points. 
C) No,the number of samples must be known. 
D) Yes. 
E) Yes,there is not enough data to determine otherwise. 
A) No,there could be a pattern to the points,the R-chart must be checked. 
B) Yes,it is unlikely that there is a pattern in these points. 
C) No,the number of samples must be known. 
D) Yes. 
E) Yes,there is not enough data to determine otherwise.

Question 3

The acceptable quality level (AQL)is the average level of quality we are willing to accept.

Accepted Answer

A) True 
 B)False

Question 4

A manager wants to build 3-sigma control limits for a process.The target value for the mean of the process is 10 units,and the standard deviation of the process is 6.If samples of size 9 are to be taken,the UCL and LCL will be

Accepted Answer

A) -8 and 28. 
B) 16 and 4. 
C) 12 and 8. 
D) 4 and 16. 
E) 8 and 12. 
A) -8 and 28. 
B) 16 and 4. 
C) 12 and 8. 
D) 4 and 16. 
E) 8 and 12.

Question 5

What is acceptance sampling?

Accepted Answer

Acceptance sampling is a metho

Question 6

The ________ is the lowest level of quality that we are willing to accept.

Accepted Answer

AQL or acc

Question 7

The term ________ is used to describe how well a process makes units within design specifications (or tolerances).

Accepted Answer

The answer of The term ________ is used to describe...

Question 8

The causes of variation in statistical process control are

Accepted Answer

A) cycles,trends,seasonality,and random variations. 
B) producer's causes and consumer's causes. 
C) mean and range. 
D) natural causes and assignable causes. 
E) Type I and Type II. 
A) cycles,trends,seasonality,and random variations. 
B) producer's causes and consumer's causes. 
C) mean and range. 
D) natural causes and assignable causes. 
E) Type I and Type II.

Question 9

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?

Accepted Answer

A) p-chart 
B) c-chart 
C)    -chart 
D) R-chart 
E)    - and R-charts 
A) p-chart 
B) c-chart 
C)    -chart 
D) R-chart 
E)    - and R-charts

Question 10

Why do range charts exist? Aren't x-bar charts enough?

Accepted Answer

Range charts and mean charts perform dif

Question 11

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   and   for this process? About what percent of all units of this liner will meet specifications?

Accepted Answer

LSL = 5.9 mm,USL = 6.1 mm. @#IMG-DLM& is (6.1 - 5.

Question 12

A retail store manager is trying to improve and control the rate at which cashiers sign customers up
for store credit cards.Suppose the manager takes 10 samples,each with 100 observations.P-bar
is found to be .05,and the manager does not want a lower limit below .0064.What z-value would
this imply,and how confident can he be that the true lower limit is greater than or equal to .0064?

Accepted Answer

Sigma-p = sqrt ( .05∗(1 - .05)/100)= .02

Question 13

A hospital-billing auditor has been inspecting patient bills.While almost all bills contain some errors,the auditor is looking now for large errors (errors in excess of $250).Among the last 100 bills inspected,the defect rate has been 16%.Calculate the upper and lower limits for the billing process for 99.7% confidence.

Accepted Answer

0.16 plus

Question 14

The number of defects after a hotel room cleaning (sheets not straight,smears on mirror,missed debris on carpet,etc. )should be measured using a(n)

Accepted Answer

A) x-bar chart. 
B) R-chart. 
C) p-chart. 
D) c-chart. 
E) either x-bar or R chart. 
A) x-bar chart. 
B) R-chart. 
C) p-chart. 
D) c-chart. 
E) either x-bar or R chart.

Question 15

The ________ is a quality control chart that indicates when changes occur in the central tendency of a production process.

Accepted Answer

The answer of The ________ is a quality control chart...

Question 16

Why are x-bar and R-charts usually used hand in hand?

Accepted Answer

The ultimate goal of the x-bar and R-cha

A Type I error occurs when

An x-bar control chart was examined and no data points fell outside of the limits.Can this process be considered in control?

The acceptable quality level (AQL)is the average level of quality we are willing to accept.

A manager wants to build 3-sigma control limits for a process.The target value for the mean of the process is 10 units,and the standard deviation of the process is 6.If samples of size 9 are to be taken,the UCL and LCL will be

What is acceptance sampling?

The ________ is the lowest level of quality that we are willing to accept.

The term ________ is used to describe how well a process makes units within design specifications (or tolerances).

The causes of variation in statistical process control are

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?

Why do range charts exist? Aren't x-bar charts enough?

The number of defects after a hotel room cleaning (sheets not straight,smears on mirror,missed debris on carpet,etc. )should be measured using a(n)

The ________ is a quality control chart that indicates when changes occur in the central tendency of a production process.

Why are x-bar and R-charts usually used hand in hand?

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy and Sustainability

Capacity and Constraint Management

Location Strategies

Layout Strategies

Human Resources,job Design,and Work Measurement

Supply-Chain Management

Outsourcing As a Supply-Chain Strategy

Inventory Management

Aggregate Planning

Material Requirements Planning Mrpand Erp

Short-Term Scheduling

Jit and Lean Operations

Maintenance and Reliability

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Filters

Exam 18: Statistical Process Control

A Type I error occurs when

An x-bar control chart was examined and no data points fell outside of the limits.Can this process be considered in control?

The acceptable quality level (AQL)is the average level of quality we are willing to accept.

A manager wants to build 3-sigma control limits for a process.The target value for the mean of the process is 10 units,and the standard deviation of the process is 6.If samples of size 9 are to be taken,the UCL and LCL will be

What is acceptance sampling?

The ________ is the lowest level of quality that we are willing to accept.

The term ________ is used to describe how well a process makes units within design specifications (or tolerances).

The causes of variation in statistical process control are

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?

Why do range charts exist? Aren't x-bar charts enough?

The number of defects after a hotel room cleaning (sheets not straight,smears on mirror,missed debris on carpet,etc. )should be measured using a(n)

The ________ is a quality control chart that indicates when changes occur in the central tendency of a production process.

Why are x-bar and R-charts usually used hand in hand?

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy and Sustainability

Capacity and Constraint Management

Location Strategies

Layout Strategies

Human Resources,job Design,and Work Measurement

Supply-Chain Management

Outsourcing As a Supply-Chain Strategy

Inventory Management

Aggregate Planning

Material Requirements Planning Mrpand Erp

Short-Term Scheduling

Jit and Lean Operations

Maintenance and Reliability

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Filters