Leonardo Lopez said:

Hi:

IIm new at this, so this might look like a stupid question, but here it goes anyway...is there any other way to prove/measure that a process is in control other than with a control chart?

Leonardo,

Welcome to Cove. There are no stupid questions. All of us here learn from each other by sharing the knowledge. Iam learning a lot of stuff from this forum everyday.Do not hesitate to post questions.

Process can be controlled by designing controls in the system. Example: Closed loop control system (Automation) which measures the output at a desired frequency and feeds back to the system thus controlling the output within desired level.

We can set up to perform this function using statistical control chart principles or just control within desired specification limits. Both are controls.

The former one is statistically controlled.

However, using statistical principles, we will know the difference between random variation and special causes. This way we do not tweak the process too often. Also using control chart principles, we can make sure if the process is stable. Once the process is stable, we can start working on reducing the variation.

Govind.