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What is Six Sigma?
There is not only one answer to what is Six Sigma. 
Firstly, six sigma is a management philosophy.  It is a customer based approach realizing that defects are expensive.  Fewer defects mean lower costs and improved customer loyalty.  The lowest cost, high value producer is the most competitive provider of goods and services.  Six Sigma is a way to achieve strategic business results.
Secondly, six sigma is a statistic.  Six Sigma processes will produce less than 3.4 defects or mistakes per million opportunities.  Many successful six sigma projects do not achieve a 3.4 ppm or less defect rate, which indicates that there is still opportunity.
Thirdly, six sigma is a process.  To implement the six sigma management philosophy and achieve the six sigma level of 3.4 defects per million opportunities or less, there is a process to be used.  The Six Sigma process is Define, Measure, Analyze, Improve, and Control (DMAIC).
6 Sigma Methods

All 6S projects go through the followings stages:

  1. Project selection targeting at under performing business processes or products.
  2. Process exploration. On this stage the business process is formalized into Y=F(Xs) function, where Y is important characteristic of the product or process and Xs are inputs bringing variations to the Y.
  3. Statistical analysis of the elements of Y=F(Xs) formula. Variations in Y are reduced, and performance is improved.
  4. Business plan to implement/sustain achieved improvements.

  Six Sigma Champions 

Business Leaders who lead Six Sigma by sponsoring projects are called "Champions"

  • Champions are trained in the essentials of the Six Sigma Methodology focusing on selecting the projects that are aligned with business goals
  • Champions must select and mentor Six Sigma project leaders called "Belts"
  • Champions must support, align and integrate the Six Sigma Launch into their organization

Six Sigma Master Black Belt

  • Often the key support person to the Champions to assist in Project Definition
  • The mentor and teacher of Six Sigma Green Belts and Six Sigma Black Belts
  • Requires extensive project management experience
  • Requires proven mastery of Six Sigma Methdology
  • Requires proven mastery of Six Sigma Statistical Tools
  • Often chosen to be the future leaders of an organization
Six Sigma Belts 
  • Belts are Six Sigma project leaders who receive training in the Six Sigma roadmap
  • Each week of training is separated by one month to allow the Belt to align project progress to the training.  Six Sigma Certification requires both projects and training.
  • Six Sigma Black Belts are project leaders who receive four weeks of training focusing on the Six Sigma Roadmap and extensive statistical methodologies.  Successful Black Belts normally dedicate at least 75 percent of their time to a four to six month Six Sigma Project
  • Six Sigma Green Belts are project leaders who receive six days to two weeks of training on the Six Sigma Roadmap and essential elements of statistical methodologies supporting Six Sigma projects.  Successful Greenbelts are able to allocate 25 to 50 percent of their time to their four to six month Six Sigma Project.
Six Sigma Projects Selection Criteria
  • "A problem with an unknown solution"
  • Projects must be aligned to organizational priorities
  • Depending on the organization, have value at least HK$800,000 for Black Belts and HK$200,000 for Green Belts
  • Projects can also be directed to high priorities metrics not only money
  • Be scoped so can be completed in 4 to 6 months
  • Follow the Six Sigma Project Roadmap
  • Define, Measure, Analyze, Improve, Control or DMAIC
  • Normally Six Sigma Projects are reviewed before the completion of each phase
  • Help create a learning organization by documenting completed projects
  • Project savings be signed off by finance

 For more information about our Six Sigma and Lean Consultancy services, please call (852) 2135-9687 or email at

Want to learn more about our courses?  Please

  • click here to understand why most people choose our Lean Six Sigma training
  • click here to join our Free Seminar
  • click here for our Lean Six Sigma Green Belt Certificate Program
  • click here for our Lean Six Sigma Black Belt Certificate Program

 See more about how our strategic partner, Minitab, support the Six Sigma, please click here.


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