Question 1

Total,one-hundred percent,inspection can never be cost justified.

Accepted Answer

A) True 
 B)False

Question 2

You are developing an "X-bar" chart based on sample means.You know the standard deviation of the sample means is 4,the desired confidence level is 99 percent and the average of the sample means is 20.What is your LCL?

Accepted Answer

The answer of You are developing an "X-bar" chart based...

Question 3

You want to develop a three-sigma "R" chart.You know the average range is 5 based on several samples of size 10.Which of the following is the resulting UCL?

Accepted Answer

A) 20.9 
B) 8.9 
C) 7.02 
D) 5 
E) 3.1 
A) 20.9 
B) 8.9 
C) 7.02 
D) 5 
E) 3.1

Question 4

If you are going to develop an "X-bar" chart based on range statistics and you are using a sample size of 12 for your charting purposes.Which of the following is the A2 factor for the "X-bar" chart?

Accepted Answer

A) 0.37 
B) 0.31 
C) 0.27 
D) 0.22 
E) 0.18 
A) 0.37 
B) 0.31 
C) 0.27 
D) 0.22 
E) 0.18

Question 5

The producer's risk associated with rejecting a high quality lot is denoted in acceptance sampling with the Greek letter beta.

Accepted Answer

A) True 
 B)False

Question 6

Explain the difference between producer's risk and consumer's risk in acceptance sampling.

Accepted Answer

Producer's risk (alpha)is the

Question 7

Quality control charts usually have a central line and upper and lower control limit lines.Which of the following is not a reason that the process being monitored with the chart should be investigated?

Accepted Answer

A) A large number of plots are close to the upper or lower control lines 
B) Erratic behavior of the plots 
C) A single plot falls above or below the control limits 
D) A change in raw materials or operators 
E) A run of five above the central line 
A) A large number of plots are close to the upper or lower control lines 
B) Erratic behavior of the plots 
C) A single plot falls above or below the control limits 
D) A change in raw materials or operators 
E) A run of five above the central line

Question 8

You want to determine the control lines for a "p" chart for quality control purposes.If the total number of defects from all samples is 560,the number of samples is 70 and the sample size is 80,what would be the standard deviation used in developing the control lines?

Accepted Answer

The answer of You want to determine the control lines...

Question 9

You have just used the capability index (Cpk)formulas to compute the two values "min [1.5,1]".Which of the following is the interpretation of these numbers?

Accepted Answer

A) The true capability index value is 1 
B) The mean of the production process has shifted to the left of the design limits 
C) The mean of the production process has shifted to the right of the design limits 
D) The mean has not shifted at all 
E) The true capability index value is between 1.5 and 1 
A) The true capability index value is 1 
B) The mean of the production process has shifted to the left of the design limits 
C) The mean of the production process has shifted to the right of the design limits 
D) The mean has not shifted at all 
E) The true capability index value is between 1.5 and 1

Question 10

The probability associated with accepting a low quality lot is denoted in acceptance sampling with the Greek letter alpha.

Accepted Answer

A) True 
 B)False

Question 11

The probability associated with rejecting a high quality lot is denoted in acceptance sampling with the Greek letter alpha.

Accepted Answer

A) True 
 B)False

Question 12

An example of assignable variation in a production system may be that workers are not identically trained.

Accepted Answer

A) True 
 B)False

Question 13

Acceptance sampling is performed on goods that already exist to determine what percentage of items conforms to specifications.

Accepted Answer

A) True 
 B)False

Question 14

You want to develop a three-sigma "R" chart.You know the average range is 12 based on several samples of size 6.Which of the following is the resulting LCL?

Accepted Answer

The answer of You want to develop a three-sigma "R"...

Question 15

The Greek letter alpha is associated with consumer's risk.

Accepted Answer

A) True 
 B)False

Question 16

For which of the following should we use a "p" chart to monitor process quality?

Accepted Answer

A) The dimensions of brick entering a kiln 
B) Lengths of boards cut in a mill 
C) The weight of fluid in a container 
D) Grades in a freshman "pass/fail" course 
E) Temperatures in a classroom 
A) The dimensions of brick entering a kiln 
B) Lengths of boards cut in a mill 
C) The weight of fluid in a container 
D) Grades in a freshman "pass/fail" course 
E) Temperatures in a classroom

Question 17

The "p" chart is only useful for sampling that deals with continuous variables.

Accepted Answer

A) True 
 B)False

Question 18

What is the symbol designating the capability index?

Accepted Answer

The answer of What is the symbol designating the capability...

Question 19

All else being equal,how large is the effect of lot size on sample size?

Accepted Answer

The effect of lot si

Question 20

Sampling plans are generally displayed graphically through the use of operating characteristic (OC)curves.

Accepted Answer

A) True 
 B)False

Exam 25: Process Capability and Spc

Total,one-hundred percent,inspection can never be cost justified.

You are developing an "X-bar" chart based on sample means.You know the standard deviation of the sample means is 4,the desired confidence level is 99 percent and the average of the sample means is 20.What is your LCL?

You want to develop a three-sigma "R" chart.You know the average range is 5 based on several samples of size 10.Which of the following is the resulting UCL?

If you are going to develop an "X-bar" chart based on range statistics and you are using a sample size of 12 for your charting purposes.Which of the following is the A2 factor for the "X-bar" chart?

The producer's risk associated with rejecting a high quality lot is denoted in acceptance sampling with the Greek letter beta.

Explain the difference between producer's risk and consumer's risk in acceptance sampling.

Quality control charts usually have a central line and upper and lower control limit lines.Which of the following is not a reason that the process being monitored with the chart should be investigated?

You want to determine the control lines for a "p" chart for quality control purposes.If the total number of defects from all samples is 560,the number of samples is 70 and the sample size is 80,what would be the standard deviation used in developing the control lines?

You have just used the capability index (Cpk)formulas to compute the two values "min [1.5,1]".Which of the following is the interpretation of these numbers?

The probability associated with accepting a low quality lot is denoted in acceptance sampling with the Greek letter alpha.

The probability associated with rejecting a high quality lot is denoted in acceptance sampling with the Greek letter alpha.

An example of assignable variation in a production system may be that workers are not identically trained.

Acceptance sampling is performed on goods that already exist to determine what percentage of items conforms to specifications.

You want to develop a three-sigma "R" chart.You know the average range is 12 based on several samples of size 6.Which of the following is the resulting LCL?

The Greek letter alpha is associated with consumer's risk.

For which of the following should we use a "p" chart to monitor process quality?

The "p" chart is only useful for sampling that deals with continuous variables.

What is the symbol designating the capability index?

All else being equal,how large is the effect of lot size on sample size?

Sampling plans are generally displayed graphically through the use of operating characteristic (OC)curves.

Introduction to the Field

Operations and Supply Strategy

Project Management

Product and Service Design

Strategic Capacity Management

Process Analysis

Manufacturing Processes

Service Processes

Six Sigma Quality

Supply-Chain Strategy

Logistics and Facility Location

Lean Manufacturing

Operations Consulting Reengineering

Enterprise Resource Planning Systems

Demand Management and Forecasting

Aggregate Sales and Operations Planning

Inventory Control

Material Requirements Planning

Scheduling

Constraint Management

Linear Programming Using the Excel Solver

Learning Curves

Job Design Work Measurement

Waiting Line Analysis

Simulation

Filters

You have just used the capability index (C_pk)formulas to compute the two values "min [1.5,1]".Which of the following is the interpretation of these numbers?