Introduction to Process Capability Presentation

Traditionally, process capability studies are performed to assess a process relative to specifications criteria. Performed correctly, such a study not only gives us a clear and data based picture of the process but, if the statistical conditions are followed, can very well foresee – short and long term – how the process will perform in the future. How powerful is that?

Statisticians often challenge the usefulness of the traditional capability indexes – Cp, Cpk, Pp, Ppk -. You will be able to easily identify some of the aspects that make the effectiveness of process capability very much dependant on the individual ability to understand the statistical concepts.

In our Introduction to Process Capability module we will explain many of the fundamental concepts that allow the reader to start in the right way.

We will describe the new way of looking at the quality in general according to Genichi Taguchi, a famous Japanese engineer and statistician.
We will also make clear to the reader the difference between the Voice of the Customer – VOC – and the Voice of the Process – VOP -.
What are the steps required to put in place a robust system for accurately measuring Process Capability?
What is the difference between Short and Long term data?
We will discuss in more detail how to calculate Process Capability when we have normal data.

In ELSE’s future modules, once we become more sophisticated in using statistics, we will discuss how to look at Process Capability when the data is not normal.

It is ELSE Team’s belief that both, readers that have just started using statistics as well as more experienced professionals, will fundamentally understand what Process Capability is and it can help in our quest to perfect quality.

The SPC Presentation Consists of: