Intro: Welcome to the E6S-Methods podcast with Jacob and Aaron, your source for expert training, coaching, consulting, and leadership in Lean, Six Sigma, and continuous improvement methods. In this episode number 65, “In the Eye of the Cash-holder” Part 1B, we continue our discussion of “stable & capable” processes with reference to customer or client expectations. Here we go.

I Capable –

a. 99.7% of process output falls within customer specifications, based on the normal curve.

i. Equivalent to Cpk=1; caveat: rules of thumb often updated to 1.33 min acceptable Cpk.

ii. Cpk =2 is equivalent to a 6 Sigma process, or 3.4 Defects Per Million Produced

b. Visualized using a histogram and “goal posts,” for customer specifications.

II Stable & Capable – There are 4 combinations of stable/capable

a. Not stable, not capable

i. Special cause variation, and significant OOS (out-of-spec) condition

b. Not stable, but capable

i. Special cause variation, but process variation is statistically within specifications

c. Stable, but not capable

i. Common cause variation, but significant OOS condition

d. Stable and capable

i. Common cause variation, and process variation is statistically within specifications

c. Stable, but not capable

i. Common cause variation, but significant OOS condition

d. Stable and capable

i. Common cause variation, and process variation is statistically within specifications

Outro: Thanks for listening to episode 65 of the E6S-Methods Podcast. Stay tuned for episode number 66, where, in the eye of the cash-holder and all of society, variation is evil. We introduce the Taguchi Loss Function in Part 2 of this “In the Eye of the Cash-holder” series. If you would like to be a guest on podcast, contact us through our website or tweet us @e6sindustries. Join our discussions on LinkedIn. Subscribe to past and future episodes on iTunes or stream us live on-demand with Stitcher Radio. Leave a 5-star review while you’re there. Find outlines and graphics for all shows and more at www.E6S-Methods.com. “Journey Through Success”