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Beginner Path

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What is Lean Six Sigma (LSS)? Check out these few select videos that are designed to give an introduction to the fundamentals of LSS.

Intermediate Path

Intermediate Path

How do I apply Lean Six Sigma (LSS)? This series of videos covers the critical tools for applying LSS to your job without getting too technical.

Advanced Path

Advanced Path

How do I get certified in Lean Six Sigma (LSS)? This full set of FREE training is used toward LSS certification by leaders from Fortune 500 companies.


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The Ultimate Purpose Of Lean Six Sigma Is NOT To Reduce Waste Or Variation

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(17 votes)

What good is it to reduce waste and variation if it doesn't make a financial impact?  Any time invested to make such "improvements" that can't be measured financially is yielding a negative return on investment (ROI).

The Ultimate Purpose Of Lean Six Sigma Is NOT To Reduce Waste Or VariationMany people (including experts) will state that the purpose of Lean is to reduce waste and the purpose of Six Sigma is to reduce variation. But I think that's like saying the purpose of a hammer is to hit a nail. While that is technically true, the real purpose of the hammer is to accomplish the purpose of the carpenter, which could be to build a house. I think this confuses the "what" with the "why" where the "what" is hitting the nail, which in and of itself is meaningless without the "why", i.e., building the house.

In the same way, reducing waste for Lean and variation for Six Sigma are merely the "what". They define the technical purpose without correlating them to the ideal purpose of the one using them. They are merely tools which, like a hammer to a skilled carpenter, are only as effective as the one using those tools. Until we make that clear distinction, we'll never fully succeed in accomplishing the "why".

What is the "Why" for Lean Six Sigma?

The ultimate purpose for Lean Six Sigma is to make the business successful primarily by improving its financial performance. Yes, it primarily comes down to money. Every organization, including non-profit organizations, must have money to survive. It doesn't matter how altruistic an organization's products, services or goals are, how satisfied their customers are, nor how beloved they are in the marketplace (all other Level 1 CTQs in the CTQ Drilldown) - without a positive financial value (e.g., cash, assets, etc.) the organization will not be able to survive very long.

So how does the "what" of Lean Six Sigma fit into this? By reducing waste in a process, Lean can help a business be more efficient which is typically measured by improved flow and productivity (for people, machines, or equipment). This kind of improvement can often be realized through reduced payroll which helps to improve the financial performance of the business.

Likewise, by reducing variation in the output from a process, Six Sigma can help a business be more effective which is typically measured by improved quality and accuracy to meet a customer's requirements and less product scrap or waste. These kinds of improvements can be realized through more revenue, less returns, and reduced cost from scrapped materials which help to improve the financial performance of the business.

Lean Six Sigma will fail if we don't focus on the "why"

I believe every Lean Six Sigma effort must be focused on improving the Level 1 CTQs of the business, especially financial performance. If you cannot tie a Lean Six Sigma project to a financial improvement in the business, then I believe that project is a failure.

That's right. It's a failure. Otherwise why would we spend our own time and resources to work a project that doesn't yield any measurable improvement back to the organization? Was it just for fun? Was it just for trying to grow the personal or political control for ourselves or our business leaders? If so, then please do the rest of us a favor and don't apply the "Lean Six Sigma" label to it; it's counter-productive to it's true intent and only gives a bad name to it and those who practice it as such.

Matt Hansen

Matt is a Lean Six Sigma Master Black Belt who has led and consulted on hundreds of process improvement initiatives for 20 years across several industries such as Government (Dept. of Defense), Insurance, Telecommunications, and Transportation.  He has developed and led an enterprise Lean Six Sigma Training and Mentoring Program as well as a one-day crash course on "Dangerous Analytics" using the most critical Lean and Six Sigma tools and concepts. The savings from the projects he has led well exceed $100 Million.

For more details about Matt's experience, you can check out his profile and connect with him on LinkedIn.  If you'd like to use Matt for consulting or speaking engagements, please contact him here.

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  • Before You Hire a Black Belt...
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    Before You Hire a Black Belt...

    How do you know if the Lean Six Sigma (LSS) Black Belt you're hiring is really qualified? Many training organizations make it too fast, cheap, and easy to get a LSS certification that it's become very difficult for recruiters and hiring managers to know which candidates are qualified. And candidates who really are qualified in LSS find it difficult to get noticed among the masses. To solve this, StatStuff offers an assessment to ensure the truly outstanding LSS candidates really stand out.

  • Straight Answers About Lean Six Sigma Certifications
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    Straight Answers About Lean Six Sigma Certifications

    So you're thinking about getting certified in Lean Six Sigma (LSS)? If you think the certification process is confusing, then just wait, it's probably far worse than you think. The process of getting certified is unlike most other types of certification methods, so there's a lot to consider. Allow me to share a few things that most LSS training organizations won't tell you but you'll be glad to know as you embark into your LSS journey. 


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