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INSE 6220 - Week 12
Advanced Statistical Approaches to Quality
Acceptance Sampling
Final Exam Review
Dr. A. Ben Hamza
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Acceptance Sampling
Why Acceptance Sampling and not 100% Inspection?
Testing is destructive
Cost of 100% inspection is high
100

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The Multivariate Quality Control Problem
INSE 6220 - Week 8
Many situations require the simultaneous monitoring or control of two or more
related quality characteristics
For example, consider a bearing with both an inner diameter (x1 ) and an
outer

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Six Sigma
INSE 6220 - Week 10
The fundamental objective of the Six Sigma methodology is the implementation
of a measurement based strategy that focuses on process improvement and
variation reduction. This is accomplished through the use of DMAIC
(Defi

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Analysis Procedure for Factorial Experiments
INSE 6220 - Week 11
Analysis Procedure for Factorial Designs
Advanced Statistical Approaches to Quality
1. Estimate the factor effects
2. Form preliminary model
3. Test for significance of factor effects
4. A

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INSE 6220 - Week 9
Advanced Statistical Approaches to Quality
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Introduction to Regression Analysis
Regression analysis is used to:
Predict the value of a dependent variable based on the value of at least one
independent variable
0.062
Explain the imp

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The Cumulative Sum (CUSUM) Control Chart
INSE 6220 - Week 6
Advanced Statistical Approaches to Quality
Although Shewhart charts with 3 limits can quickly detect large
process changes, they are ineffective for small, sustained process
changes (for exa

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INSE 6220 - Week 3
Random Variables and Probability Density Functions
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A random variable is a quantity whose value is not known exactly but its probability distribution is known. The
value of the random variable will vary from trial to trial as the exp

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Process capability analysis
INSE 6220 - Week 5
Advanced Statistical Approaches to Quality
1. Compute the mean of sample means ( X ).
2. Compute the mean of sample ranges ( R ).
S Chart
0.35
0.3
3. Estimate the population standard deviation (x):
x = R

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Using the normal cdf and pdf
INSE 6220 - Week 4
Advanced Statistical Approaches to Quality
We often want to talk about percentage
points of the distribution-portion in the
tails.
P( Z z / 2 ) 1 P ( Z z / 2 ) 1 ( z / 2 )
2
( z / 2 ) 1
2
-1
z / 2 =

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Contents
INSE 6220 - Week 2
Advanced Statistical Approaches to Quality
Probability
Distributions
Descriptive Statistics
Example 1:
Probability of success in test
Estimation theory
Overview of Course Contents
Statistical Methods using MATLAB
Statist

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What is INSE 6220?
INSE 6220 - Week 1
Advanced Statistical Approaches to Quality
INSE 6220 is a Quality Systems Engineering course
Go over Course Outline
You will learn
Overview of Quality Control
Introduction to Statistical Quality Control
To a