Spring 2013
Multiple choice + word problem
Duration: 100 min
(Pencil + eraser or Pen) + Calculator
Starting time 7:30am
One sample mean
Variance known/unknown
One sample variance
One proportion
Two sample mean
Variance known/unknown
Two sample variance
Chance causes of
variation
The process is in
statistical control
Causes of
variation
Assignable causes of
variation
The process is out of
statistical control
Review of Statistics
1
Industrial Quality Control
1
Contents
Key concepts: Population and sample
Basic statistics
Point estimation
Mean
Variance
Interval estimation & statistical inference
Single sample statistical inference
Twosample statistical
inf
CH(6):
Unbaised Est. of Sigma = S Bar / c4
CH(7):
c
where p (or p if no standard is given) is the process fraction nonconforming in
the incontrol state.
Such a control chart has the center line at zero, and upper and low
Process Control Theoretical Foundation
1
Industrial Quality Control
1
Key model
We monitor a measureable quality characteristic:
ASSUMPTION
We assume that the quality characteristic is normally distributed with parameters
, 2.
This is equivalent to sayi
Industrial & Systems
Engineering
Semester:
Course ID:
Description:
Section:
Fall
2016
ESI
4221C
Industrial
Quality Control
2611
HW 2
Due, Oct. 4, 2016
Assignment
You have to submit your answers in a short typewritten (wordprocessed) report in PDF
format.
Control Charts for Attributes
1
Industrial Quality Control
1
Contents
Attributes and nonconforming products
Fraction nonconforming
Control chart limits
Sample size
np control chart
Variable sample size
Applications in Transactional and Service Businesses
Review of Statistics
1
Industrial Quality Control
1
Contents
Key concepts: Population and sample
Basic statistics
Point estimation
Mean
Variance
Interval estimation & statistical inference
Single sample statistical inference
Twosample statistical
inf
Homework # 1
EIN 6227
due September 11, 2015
1. A hospital emergency department is monitoring the time required to admit a patient using X
and R charts. The table below presents summary data for 20 subgroups of two patients each
(time is in minutes).
Subg
Review of Statistics
1
Industrial Quality Control
1
Contents
Key concepts: Population and sample
Basic statistics
Point estimation
Mean
Variance
Interval estimation & statistical inference
Single sample statistical inference
Twosample statistical
inf
Other Statistical ProcessMonitoring and
Control Techniques
1
Industrial Quality Control
1
Overview
All we have done so far involved Shewhart control charts.
Very useful technique in Phase I.
Disadvantage: ignores any information given by the entire seque
ESI 4221C Industrial Quality Control
February 27, 2013
Name _
UFID _
Duration: 100 minutes
Rules:

Closed book, closednotes.
You may use a calculator and the formula sheet.
Show details of your work, where appropriate. You will not receive full credit f
ESI 4221C: Quality
and

charts
When
are known
chart
Where
chart
Where

When
are unknown
chart
Where
chart
and
Where
and

and
charts
When
and
are known
chart
chart
where

When
and
are unknown
chart
where
and
chart
where
and
chart
If the true fraction
Spring 2013
Multiple choices + word problems
Location: FLG 270
Time: Wednesday, 4/24/2013
7:30am 9:10am (100 minutes)
(Pencil + eraser or Pen) + Calculator
Please do NOT share
Bring them with you
Cheat sheets will be provided. You need to
know / memoriz
ESI 4221C Industrial Quality Control
Quiz 3
Name (Please Print) _
A type of storage battery lasts, on average 3.0 years, with a standard deviation of
0.4 year. Assume the lifetime of this battery follows a normal distribution.
A random sample of 16 batter
ESI 4221C Industrial Quality Control
Quiz 4
Name (Please Print) _
_
A process that is operating in the presence of chance causes
is said to be out of control.
FALSE assignable causes
_
If all the points plot inside the control limits, but they behave in
a
ESI 4221C Industrial Quality Control
Quiz 5
Name (Please Print) _
Samples of size n=8 are taken from a process at regular intervals. A quality characteristic
which follows normal distribution is measured, and and R values are calculated for
each of the fi
ESI 4221C Industrial Quality Control
Quiz 6
Name (Please Print) _
Problem 1: Suppose you want to build a pchart for the percentage of nonconforming products
produced by a process based on 20 samples of size n=12. You know that
, where
is the defective ra
ESI 4221C Industrial Quality Control
Quiz Extra Credit
Name (Please Print) _
The shelf life of store meats is the time a prepackaged cut remains salable,
safe and nutritious. Standard packaging in ambient air atmosphere has a shelf
life of about 48 hours
EIN 4221
Homework # 2
due September 28, 2015
1. A manufacturer produces nonreturnable glass bottles for a softdrink beverage. The wall
thickness of the bottles is an important quality characteristic. If the wall is too thin, internal
pressure generated d