Calculating CL, LCL and UCL for Variable Type Characteristics
- Last UpdatedMar 19, 2016
- 1 minute read
You can calculate the center line, LCL and UCL for each chart type based on different sigma calculation methods. The following table shows the result data captured for each sample and its deviation from specification limits.
|
Sample ID |
Sample Time |
Specifi- |
Charac- |
Value No. |
Value |
Is the Value Out of Spec Limits |
Deviation from Lower Spec Limit |
Deviation from Upper Spec Limit |
|---|---|---|---|---|---|---|---|---|
|
3 |
10:30a |
SpecC |
Width |
2 |
0.9550 |
False |
||
|
3 |
10:30a |
SpecC |
Width |
4 |
0.9400 |
False |
||
|
3 |
10:30a |
SpecC |
Width |
5 |
0.9600 |
False |
||
|
4 |
10:45a |
SpecC |
Width |
1 |
0.9525 |
False |
||
|
5 |
11:00a |
SpecC |
Width |
1 |
0.9575 |
False |
||
|
51 |
11:15a |
SpecC |
Width |
1 |
0.9400 |
False |
||
|
51 |
11:15a |
SpecC |
Width |
3 |
0.9500 |
False |
The following examples use the last chart point that can be plotted for a chart to illustrate the control limit calculations.