1
Q
Total Process Variation
A
Common Cause Variation
Special Cause Variation
2
Q
Common Cause Variation
A
Naturally occuring and expected
Result from normal variation in materials, tools, machines, operators, and the environment
3
Q
Special Cause Variation
A
Abnormal or unexpected variation
Has an assignable cause
Variation beyond what is considered inherent to the process
4
Q
SPC
A
Statistical Process Control
Monitoring a process to identify special causes of variations and signal the need to ttake action
Relies on control charts
5
Q
Histograms vs. Control Charts
A
Histograms do not take into account changes over time
Control charts can tell us when a process changes
IDIS 434
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Decks in class (15)
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