Deck 19: Statistical Process Control

Question 1

Mohammed is monitoring the diameter of bolts being produced on one of his assigned production lines.During this process,he notices one,single measurement that jumped above the upper control limit.He immediately adjusts the alignment on several machines to address the problem.Mohammed has likely

A)committed a type II error.
B)made a good decision.
C)committed a type I error.
D)committed both a type I and type II error.

Answer 1

committed a type I error.

Question 2

"Tampering" can actually make a system worse.

Answer 2

True

Question 3

Deming said that we should utilize work standards that prescribe quotas for the workforce and provide numeric goals for people in management.

Answer 3

False

Question 4

The chart plots the averages of small subsamples through time.

Question 5

One of the areas where statistics has had the largest impact in the business world is the area of quality.

Question 6

Common cause variation is the inherent variation in an in-control process.

Question 7

Jean is examining variation on a control chart.One of the machines was misaligned and is operated by an inexperienced worker.The variation caused by these factors is caused by _____ causes.

A)assignable
B)in statistical control
C)common
D)in control

Question 8

Deming said we should eliminate the need for mass inspection as a way to achieve quality by building quality into the product in the first place.

Question 9

Jada has decided to implement weekly meetings between departments to discuss issues that occur cross-department.She also has implemented a worker morale program aimed at building teamwork.These are both events that even the most upper management will attend.Which of Deming's 14 Points is Jada addressing?

A)Have Constancy of Purpose
B)Embrace the New Philosophy
C)Institute Leadership of People
D)Break Down Barriers

Question 10

Michael has incorporated a vigorous cross-training program within his department.This is an example of which of Deming's 14 points?

A)Improve Every Process
B)Institute Training
C)Drive Out Fear
D)Encourage Education

Question 11

Which of the following is not one of Deming's 14 Points?

A)Use Lowest-Tender Contracts
B)Have Constancy of Purpose
C)Institute Leadership of People
D)Break Down Barriers

Question 12

Deming wrote a list of 24 points,which serve as an overview of quality management.

Question 13

Mohammed is monitoring the diameter of bolts that are being produced on one of his assigned production lines.During this process,he notices nine,consecutive measurements that jumped above the upper control limit.He immediately examines the machine,finds it to be misaligned,and makes a small adjustment.Mohammed has likely committed

A)a type II error.
B)both a type I and type II error.
C)a type I error.
D)neither a type I nor a type II error.

Question 14

The two basic types of control charts are control charts for factors and control charts for treatments.

Question 15

Deming said that we should aim to improve the system of production and service annually in order to improve quality and production and decrease costs.

Question 16

The control limits for an R chart are set at

A)approximately one standard deviation from the average .
B)-1 and +1.
C)approximately three standard deviations from the average .
D)0 and +1.

Question 17

In the past,quality was often synonymous with surveying.

Question 18

Quality movement and the statistical tools for quality improvement are helpful in

A)manufacturing.
B)the banking industry.
C)the hotel industry.
D)all of these industries.

Question 19

A p chart plots the proportions of items that are conforming.

Question 20

One of the areas where statistics has had the largest impact in the business world is the area of quality.

Question 21

Morgan has calculated the upper and lower limit for control limits in an chart.She doesn't have the software available to create these charts automatically,so she is wondering what happens to these limits if n decreases.Explain what happens to the limits and why.

Question 22

Out-of-control indicators may include a number of conditions.What is not one of these?

A)At least 8 upward (or downward)consecutive changes
B)At least 8 consecutive points above (or below)the centerline
C)At least 1 point beyond two standard deviations from the centerline
D)At least 4 of 5 consecutive points beyond one standard deviation from the centerline

Question 23

The average run length (ARL)indicates the mean length of time between

A)false alarms in an in-control process.
B)false alarms in an out-of-control process.
C)out-of-control indications in an out-of-control process.
D)type II errors in an in-control process.

Question 24

Which of the following are attributes charts?

A)p chart, chart,and u chart
B)p chart,X chart,and u chart
C)p chart,c chart,and u chart
D)p chart,c chart,and R chart