Friday, 28 June 2013

6-Sigma twaddle

Diversion - I've wandered into a management quicksand as part of my asset management explorations.

Lean Six Sigma: Combining Six Sigma Quality with Lean Speed - WHAT - is this stuff? 

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This surely is management twaddle gone mad! Brown belts, yellow belts - do we really need all this - not very agile and looks a bit old school. I'm sure its all very well for improving what a business does but do we really need all the associated scientific psycho-babble.

Quote from my font of knowledge;

"Hence the widely accepted definition of a six sigma process is a process that produces 3.4 defective parts per million opportunities (DPMO). This is based on the fact that a process that is normally distributed will have 3.4 parts per million beyond a point that is 4.5 standard deviations above or below the mean (one-sided capability study).[6] So the 3.4 DPMO of a six sigma process in fact corresponds to 4.5 sigma, namely 6 sigma minus the 1.5-sigma shift introduced to account for long-term variation.[6] This allows for the fact that special causes may result in a deterioration in process performance over time, and is designed to prevent underestimation of the defect levels likely to be encountered in real-life operation.[6]
The role of the sigma shift is mainly academic. The purpose of six sigma is to generate organizational performance improvement. It is up to the organisation to determine, based on customer expectations, what the appropriate sigma level of a process is. The purpose of the sigma value is as a comparative figure to determine whether a process is improving, deteriorating, stagnant or non-competitive with others in the same business. Six sigma (3.4 DPMO) is not the goal of all processes."

If you believe all that you will believe anything - can we get some real scientist involved please.

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