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Narrated PowerPoint presentations on Capability Analysis are available here via the American Society for Quality (ASQ)
Title: Cpk Versus Ppk
Author: Keith M. Bower
Publication Source: American Society for Quality,
Six Sigma Forum, April 2005
Abstract
Understanding the concept of “long-term” versus “short-term” variation is crucial to obtaining valid results from capability studies.
Notes
My goal for this paper was to address the difference between the statistics, and illustrate why the occasionally fierce debate between practitioners is moot when sampling from a stable system. My understanding of capability analysis procedures, and requirements for legitimacy in interpretation, is more fully fleshed out in the paper on Non-Normal Capability Analysis.
This topic is also discussed in Podcast 1.
A discussion on "What is Cpk?" is in the Video Podcast below:
To download Adobe Acrobat (for free) click here.