chapter 20

Question 1

2 aspects of quality

Answer 1

1. Product features

2. Freedom from deficiencies

Question 2

What is statistical quality control

Answer 2

where inferences are made about the quality of a population of manufactured items based on a sample taken from the population

Question 3

2 statistical sampling methods in quality control

Answer 3

1. Control Charts

2. acceptance sampling

Question 4

What is a control chart

Answer 4

a graphical technique in which stats on one or more part or product characteristics of interest plotted over time to determine if its behaving normal or abnormal

Question 5

what is acceptance sampling

Answer 5

a stat technique in which a sample drawn from a batch of parts its inspected, and a decision is made whether to reject or accept batch based on quality of sample

Question 6

uses of acceptance sampling

Answer 6

1. Verifying quality of raw materials from vendors
2. deciding whether or not to ship a batch of parts
3. inspecting parts between manufacturing steps in a sequence

Question 7

management principles and practices pg.20.2.1

Answer 7

d

Question 8

what are three main objectives of total quality management

Answer 8

1. achieving customer satisfaction
2. continuously improving
3. involving the entire work force

Question 9

page 20.2.2

Answer 9

factors of modern view of QM

Question 10

Modern technologies in quality control include

Answer 10

1. quality engineering
2. quality function deployment
3. 100%automated inspection
4. on-line inspection
5. coordinate measurement machines for dimensional measurement
6. non contactsensors such as machine vision for inspection

Question 11

Process variations divided into 2 types

Answer 11

1. random

2. assignable

Question 12

wide vs narrow tolernces

Answer 12

s

Question 13

overall objectives of SPC

Answer 13

1. improve quality of process output
2. reduce process variability and achieve process stability
3. solve processing problems

Question 14

7 methods and tools used in SPC

Answer 14

1. control charts
2. histograms
3. pareto charts
4. check sheets
5. defect concentration diagrams
6. scatter diagrams
7. cause-and-effect diagrams

Question 15

parts of control charts

Answer 15

CL
LCL
UCL

Question 16

2 types of control charts

Answer 16

1. control charts for variables

2. control charts for attributes

Question 17

a process out of statistical control manifest this condition in changes in

Answer 17

1. process mean

2. process variability

Question 18

2 types of control charts for variables

Answer 18

1. x chart

2. R chart

Question 19

2 types of control charts for attributes

Answer 19

1. the p chart

2. the c chart

Question 20

what features visible on histogram

Answer 20

1. shape of distribution
2. any central tendency of distribution
3. approximations of the means and mode
4. amount of scatter in data

Question 21

Paerto’s law

Answer 21

the vital few and the trivial many

the 80-20 rule

Question 22

5 elements of

Answer 22

20.4

Question 23

goals of six sigma

Answer 23

1.better customer satisfaction
2.higher quality products and services
3.reduced defects
continuous improvement
6.cost reduction

Question 24

DMAIC

Answer 24

d