What are control limits on a control chart?
Also to know is, what are warning limits on a control chart?
Definition of Warning Limits: In a control chart, if control limits are placed at two times the standard deviation from the process average then the limits are said to be Warning Limits or Two Sigma Limits.
Beside above, what do control limits represent? The control limits of your control chart represent your process variation and help indicate when your process is out of control. Control limits are the horizontal lines above and below the center line that are used to judge whether a process is out of control.
Likewise, how do you find the control limit on a control chart?
Control limits are calculated by:
- Estimating the standard deviation, σ, of the sample data.
- Multiplying that number by three.
- Adding (3 x σ to the average) for the UCL and subtracting (3 x σ from the average) for the LCL.
What is control limits and specification limits?
Specification limits are the targets set for the process/product by customer or market performance or internal target. In short it is the intended result on the metric that is measured. Control limits on the other hand are the indicators of the variation in the performance of the process.