Question 1

What is the purpose of a process-capability study and what is a process capability index?

Accepted Answer

Process capability refers to the natural

Question 2

Quality control focuses on the design of a good or service to ensure meeting customer expectations.

Accepted Answer

A) True 
 B)False

Question 3

Larger sample sizes allow smaller changes in process characteristics to be detected with higher probability.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is not a component of a control system?

Accepted Answer

A) Statistical sampling 
B) Measures of actual performance 
C) Goals or standards 
D) Comparison of actual performance with standards or goals for corrective action if necessary 
A) Statistical sampling 
B) Measures of actual performance 
C) Goals or standards 
D) Comparison of actual performance with standards or goals for corrective action if necessary

Question 5

A system governed only by common causes is called a stable system.

Accepted Answer

A) True 
 B)False

Question 6

Common cause variation generally accounts for about 10 to 15% of all variation within a process.

Accepted Answer

A) True 
 B)False

Question 7

When the range of process variation is larger than the design specifications, the process capability index will be less than 1.

Accepted Answer

A) True 
 B)False

Question 8

A manufacturing company has a production process that has a target percent nonconforming of 4% which was developed based on numerous samples of 200 observations each. They want to develop control charts using 3 standard deviation limits.
a. What is the center line for the p chart?
b. What is the upper control limit for a p chart?
c. What is the lower control limit for a p chart?

Accepted Answer

The answer of A manufacturing company has a production process...

Question 9

A manufacturer inspected 40 circuit boards and found a total of 640 defects. If the company wants to use SPC to control the manufacturing process by monitoring the number of defects per circuit board, what type of chart should they use and what should the control limits be?

Accepted Answer

The correct chart to use is a c-chart. T

Question 10

To monitor the fraction of printed circuit boards that do not pass a functional test, (an) ____ is used.

Accepted Answer

A) -chart 
B) p-chart 
C) c-chart 
D) R-chart 
A) -chart 
B) p-chart 
C) c-chart 
D) R-chart

Question 11

A bottling machine fills soft drink bottles with an average of 12.000 ounces with a standard deviation of 0.002 ounces. Determine the process capability index, Cp, if the design specification for the fill weight of the bottles is 12.000 ounces plus or minus 0.015 ounces.

Accepted Answer

LTL = 11.985; UTL =

Question 12

It is not necessary to have a process in control when establishing control limits.

Accepted Answer

A) True 
 B)False

Question 13

The goal of statistical process control SPC) is to help identify and eliminate unwanted causes of variation.

Accepted Answer

A) True 
 B)False

Question 14

A company that makes handheld computers is trying to improve one of its poorer selling products. They conducted some customer surveys and found that customers prefer the product to weigh between 10 and 14 ounces. At present, the mean of the process is 12 ounces and the standard deviation of the process is .4 ounces. They want to ensure that the production process will meet customer expectations; that is, the process capability index Cp) will be greater than or equal to 1.00.
a. What is the Cp of the current production process?
b. What does the standard deviation of the process have to be for the Cp to equal 1.00?

Accepted Answer

a. C_p =( UTL - LTL)/[(6)St dev of process

Question 15

Fifteen samples of size 5 have been taken from a production process. The sum of the sample averages was found to be 92.54 cm while the sum of the ranges was 115.36. Find the values of the center lines for the x-bar and R charts.

Accepted Answer

For the x-bar chart,

Question 16

The upper and lower specification limits for a component are 4.20, and 4.30 ounces, respectively. The process standard deviation is .02, and the process average is 4.24 ounces. Which one of the following statements is true.

Accepted Answer

A) The Cp index indicates the process is centered. 
B) The Cp index indicates the process is not centered. 
C) The Cpk index indicates the process is centered. 
D) The Cpk index indicates the process is not centered. 
A) The Cp index indicates the process is centered. 
B) The Cp index indicates the process is not centered. 
C) The Cpk index indicates the process is centered. 
D) The Cpk index indicates the process is not centered.

Question 17

It generally costs more to correct an error or defect at the design stage than after it has reached the customer.

Accepted Answer

A) True 
 B)False

Question 18

"Quality at the source" focuses on supplier quality at the beginning of a value chain.

Accepted Answer

A) True 
 B)False

Question 19

Ritz-Carlton Hotel Company uses which one of the following methods to control quality?

Accepted Answer

A) R-bar and x-bar control charts to monitor customer complaints. 
B) The 1:10:100 rule for goods quality only 
C) Self-control of the individual employee based on their spontaneous behavior. 
D) The process capability index for all goods and services provided by the hotel. 
A) R-bar and x-bar control charts to monitor customer complaints. 
B) The 1:10:100 rule for goods quality only 
C) Self-control of the individual employee based on their spontaneous behavior. 
D) The process capability index for all goods and services provided by the hotel.

Question 20

A high?paced discount store in Los Angeles has noticed that checking errors have increased recently. They plan to use control charts with three standard deviation control limits to monitor the process. They decided to take a sample of 100 transactions over each of 10 days. The number of transactions in error for each day was 5, 7, 6, 5, 6, 4, 6, 3, 10, and 8.
a. What is the center line for the p chart?
b. What is the upper control limit for the p chart?
c. What is the lower control limit for the p chart?

Accepted Answer

The answer of A high?paced discount store in Los Angeles...

What is the purpose of a process-capability study and what is a process capability index?

Quality control focuses on the design of a good or service to ensure meeting customer expectations.

Larger sample sizes allow smaller changes in process characteristics to be detected with higher probability.

Which of the following is not a component of a control system?

A system governed only by common causes is called a stable system.

Common cause variation generally accounts for about 10 to 15% of all variation within a process.

When the range of process variation is larger than the design specifications, the process capability index will be less than 1.

A manufacturer inspected 40 circuit boards and found a total of 640 defects. If the company wants to use SPC to control the manufacturing process by monitoring the number of defects per circuit board, what type of chart should they use and what should the control limits be?

To monitor the fraction of printed circuit boards that do not pass a functional test, (an) ____ is used.

A bottling machine fills soft drink bottles with an average of 12.000 ounces with a standard deviation of 0.002 ounces. Determine the process capability index, C_p, if the design specification for the fill weight of the bottles is 12.000 ounces plus or minus 0.015 ounces.

It is not necessary to have a process in control when establishing control limits.

The goal of statistical process control SPC) is to help identify and eliminate unwanted causes of variation.

Fifteen samples of size 5 have been taken from a production process. The sum of the sample averages was found to be 92.54 cm while the sum of the ranges was 115.36. Find the values of the center lines for the x-bar and R charts.

The upper and lower specification limits for a component are 4.20, and 4.30 ounces, respectively. The process standard deviation is .02, and the process average is 4.24 ounces. Which one of the following statements is true.

It generally costs more to correct an error or defect at the design stage than after it has reached the customer.

"Quality at the source" focuses on supplier quality at the beginning of a value chain.

Ritz-Carlton Hotel Company uses which one of the following methods to control quality?

Goods, Services, and Operations Management

Value Chains

Measuring Performance in Operations

Operations Strategy

Technology and Operations Management

Goods and Service Design

Process Selection, Design, and Analysis

Facility and Work Design

Supply Chain Design

Capacity Management

Forecasting and Demand Planning

Managing Inventories

Resource Management

Operations Scheduling and Sequencing

Quality Management

Lean Operating Systems

Project Management

Work Measurement, Learning Curves, and Standards

Queuing Analysis

Modeling Using Linear Programming

Simulation

Work Measurement, Learning Curves, and Standards

Filters

Exam 16: Quality Control and Spc

What is the purpose of a process-capability study and what is a process capability index?

Quality control focuses on the design of a good or service to ensure meeting customer expectations.

Larger sample sizes allow smaller changes in process characteristics to be detected with higher probability.

Which of the following is not a component of a control system?

A system governed only by common causes is called a stable system.

Common cause variation generally accounts for about 10 to 15% of all variation within a process.

When the range of process variation is larger than the design specifications, the process capability index will be less than 1.

A manufacturer inspected 40 circuit boards and found a total of 640 defects. If the company wants to use SPC to control the manufacturing process by monitoring the number of defects per circuit board, what type of chart should they use and what should the control limits be?

To monitor the fraction of printed circuit boards that do not pass a functional test, (an) ____ is used.

A bottling machine fills soft drink bottles with an average of 12.000 ounces with a standard deviation of 0.002 ounces. Determine the process capability index, Cp, if the design specification for the fill weight of the bottles is 12.000 ounces plus or minus 0.015 ounces.

It is not necessary to have a process in control when establishing control limits.

The goal of statistical process control SPC) is to help identify and eliminate unwanted causes of variation.

Fifteen samples of size 5 have been taken from a production process. The sum of the sample averages was found to be 92.54 cm while the sum of the ranges was 115.36. Find the values of the center lines for the x-bar and R charts.

The upper and lower specification limits for a component are 4.20, and 4.30 ounces, respectively. The process standard deviation is .02, and the process average is 4.24 ounces. Which one of the following statements is true.

It generally costs more to correct an error or defect at the design stage than after it has reached the customer.

"Quality at the source" focuses on supplier quality at the beginning of a value chain.

Ritz-Carlton Hotel Company uses which one of the following methods to control quality?

Goods, Services, and Operations Management

Value Chains

Measuring Performance in Operations

Operations Strategy

Technology and Operations Management

Goods and Service Design

Process Selection, Design, and Analysis

Facility and Work Design

Supply Chain Design

Capacity Management

Forecasting and Demand Planning

Managing Inventories

Resource Management

Operations Scheduling and Sequencing

Quality Management

Lean Operating Systems

Project Management

Work Measurement, Learning Curves, and Standards

Queuing Analysis

Modeling Using Linear Programming

Simulation

Work Measurement, Learning Curves, and Standards

Filters

A bottling machine fills soft drink bottles with an average of 12.000 ounces with a standard deviation of 0.002 ounces. Determine the process capability index, C_p, if the design specification for the fill weight of the bottles is 12.000 ounces plus or minus 0.015 ounces.