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Lesson 1
Statistical
Process Control
Concepts |
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Lesson 3
Attributes
Control Charts |
Purposes
and Value of SPC
Quality Characteristics
Variables
Attributes
Histograms
The Normal Distribution
Mean/Average
Standard Deviation/Range/Spread
Examples and Exercises
Charting Data Over Time
Deming's 14 points
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Conformance
to Specifications
Nonconformities/defects
Nonconforming/defective
Types of Attributes Charts -- Decision Tree
p Chart:
(%) of nonconforming units
Variable subgroup sizes OK
Need large enough sample
size to find nonconforming
units
Creating a p chart
np Chart:
Number of nonconforming
units
Needs constant subgroup size
Creating an np chart
c Chart:
Number of nonconformities
per subgroup
Can be any unit of production
Need constant subgroup size
Creating a c chartu Chart:
Number of nonconformities
per unit
Can be any unit of production
Variable subgroup sizes OK
Examples and Exercises
Analyzing Attributes Charts for Suggested Actions
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| Lesson 2
Variables Control Charts |
Application
of the Central Limit Theorem
Components of a Control Chart:
Rational subgroups, "within" variation, and "between" variation
X-bar, R Control Limits
Analyzing SPC Charts for Patterns of Variation
Natural Patterns
Unatural Patterns
Outliers
Runs
Trends
Sudden change in level
Others (Western Electric
Rules)
Responding to Chart Signals
What to Do
What Not to Do
Creating and Plotting SPC Charts
Filling out top of chart
Entering subgroup sample
data
Calculating X-bar and R
values
Plotting X-bar and R values
Determining Process Capability
Control vs. Capability
Conditions/Assumptions for Determining Capability
The Process Capability Index (Cp and Cpk; Cpm;Ppk)
Identifying the Need for Corrective Action and Process Capability Improvement
(Variation Reduction)
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Lesson 4
Other Types of SPC Control
Charts |
Variations of Conventional Control Charts
X-bar, S Chart; Median Chart;
IX, MR Chart
Target X-bar, R Chart
Target IX-MR Chart
Porportional Chart
Group Charts
3D X-bar, R Chart
Charts for Processes with Predictable Trends
Short-Run X-bar, R Chart
Short-Run Group Charts
Short-Run Attributes Charts |
