**Process stability**is one of the most important concepts of the

**Six Sigma**methodology, or any quality improvement methodology for that matter.

**Stability**involves achieving consistent and, ultimately, higher

**process**yields through the application of an improvement methodology.

Also question is, how do you determine if a process is stable?

**If** the **process** distribution remains consistent over time, i.e. the outputs fall within the range (**Process** Width), then the **process** is said to be **stable** or in control. **If** the Outputs are spread across outside the limits, then the **process** is Unstable or Out of Control.

Beside above, what is stability in process control? **Process Stability** refers to the consistency of the **process** with respect to important **process** characteristics such as the average value of a key dimension or the variation in that key dimension. If the **process** behaves consistently over time, then we say that the **process** is **stable** or in **control**.

Also to know is, what is stable and capable process?

A **Capable Process** is a **process** that has achieved it’s specified quality and product goals and objectives. A **Stable process** is one that is operating within specified control limits and without excessive variation.

What is a capable process?

**Process** Capability (Cp) is a statistical measurement of a **process’s** ability to produce parts within specified limits on a consistent basis. Cp tells you if your **process** is **capable** of making parts within specifications and Cpk tells you if your **process** is centered between the specification limits.