All entries for Wednesday 21 January 2009

January 21, 2009

Six Sigma and Profound Knowledge

In the past couple days I have been researching Six Sigma in relation to Deming's system of Profound Knowledge (SoPK). Initially, this was a difficult task because I was not familiar with the Six Sigma methodologies. And for SoPK, although we have studied it before during CBE, I never looked at it from from the angle of process improvement. So quite naturally, I focused on the technical but obvious features shared between the two including

  1. Variation as Normal Distribution versus Variation on a control chart
  2. PDCA versus DMAIC- comparable or quite different?
  3. Variation as common/special cause versus Defect per Million Opportunities (DPMO)
  4. Continous improvement versus Conformance to specification
  5. Even tried to understand the drifting of the distribution and the whole Taguchi loss function, 1.5 sigma drift etc .. but it just lost me...

Even though this has all been rather confusing at first, I did manage to get a better idea of what exactly six sigma is and try to achieve. This has helped me tremendously with PIUS mini project one. I was able to distinguish between the technical (project) level relationships from theorectical (conceptual) level relationships much better.

I resist from the temptation to draw any conclusions prematurely. This will best be left for the presentation tomorrow. I will look forward to it.


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