Mean of one sample
Mean of whole process
Range
Process capability process
D3 R
D2 R
R – D3 R
D2 R
X bar
R bar
X double bar
R double bar
Final limits
Trial limits
Warning limits
Pattern limits
Control charts
On site inspection
Whole lot inspection
Acceptance sampling
Specifications
Control limits
Process standard deviation
Mean of any one sample
Yes, Specification limits = Control limits
Yes, Control limits=Specification limits/2
No
Yes, Control limits*0.5 = Specification limits
Limits defined by customers
Limits driven by the natural variability of the process
Limits driven by the inherent variability of the process
Statistical limits
Process mean
Sample standard deviation
Process standard deviation
Sample mean
x bar chart
R chart
C chart
P chart