1
Q
When shoud you apply control charts
A
At the beginning of a process
Befor a costly or irreversible point
2
Q
Developing Control Charts
A
Prepare Collect Data Determine trial control limits Analyze and interpret results Use as a problem solving tool Compute process capability
3
Q
Control Chart Patterns
A
Cyclic Mixtures (Two or more sources) Shifts Trends Stratification
4
Q
Typical Out-of-Control Patterns
A
Point outside control limits Sudden shift in average Cycles Trends Hugging the center line Hugging the control limits Instablility
5
Q
ARL
A
Average Run Length
Length of time that should plot in control before a point plots outside the control limit
IDIS 434
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