Ch. 6

Question 1

Statistical Process Control

Answer 1

inspecting a random sample to determine if it produces products within a predetermined range

Question 2

Two causes of Variation

Answer 2

common and assignable

Question 3

Ex. of Common Variation

Answer 3

slight differences in materials, workers, machines, tools, and other factors

Question 4

Common Variation

Answer 4

random, unidentifiable

Question 5

Assignable Variation

Answer 5

identifiable, can be eliminated

Question 6

Out of control

Answer 6

when a plot of data falls outside the preset control limits

Question 7

Control chart for Variables

Answer 7

used to monitor characteristics that can be measured and have a continuous scale

Question 8

Control chart for Attributes

Answer 8

used to monitor characteristics that have discrete values and can be counted

Question 9

Process width when computing the process capability index?

Answer 9

6

Question 10

Acceptance Sampling is done when?

Answer 10

done before or after the process

Question 11

Acceptance Sampling

Answer 11

process of randomly inspecting a certain number of items from a batch to know if the entire batch should be accepted or rejected

Question 12

Why have services lagged behind manufacturing in statistical process control?

Answer 12

it is difficult to measure the quality of a service

Question 13

The issue that complicates service quality control?

Answer 13

the presence of the customer at time of service delivery

Question 14

Six Sigma Quality

Answer 14

3.4 million

Question 15

X-bar chart

Answer 15

control chart used to monitor changes in the mean value

Question 16

Statistical process control (SPC)

Answer 16

inspects a random sample of the output of the process and decides whether the process is producing within the characteristics and range given

Question 17

Statistical quality control (SQC)

Answer 17

general category of statistical tools to evaluate organizational quality

Question 18

Sampling plan

Answer 18

precisely specifies the parameters of sampling process with acceptance/rejection criteria

Question 19

Range (R) chart

Answer 19

control chart that monitors changes in the dispersion of a process

Question 20

Producers risk

Answer 20

chance that a lot containing an acceptable quality level will be rejected

Question 21

P-chart

Answer 21

monitors the proportion of defects in a sample

Question 22

Operating Characterize (OC) Curve

Answer 22

graph that shows the probability of accepting a lot given various proportions of defects in a lot

Question 23

Lot Tolerance Percent Defective (LTPD)

Answer 23

upper limit of percentage of defective items consumers are willing to tolerate

Question 24

Consumer Risk

Answer 24

chance of accepting a lot that contains a greater number of defects than the LTPD limit

Question 25

C-chart

Answer 25

monitors the number of defects per unit

Question 26

Average Outgoing Quality (AOQ)

Answer 26

expected proportion of defective items that will be passed to the customer under the sampling plan

Question 27

Attribute

Answer 27

characteristic that has a discrete value and can be counted