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THE SIX SIGMA METHODOLOGY

 
Six Sigma is a process improvement method designed to reduce unwanted variations that cause malfunctions and non-quality. It focuses on identifying the root causes of a problem before looking for solutions and forces to use factual data to validate the hypothesis. Six sigma also uses a project management approach and is going through 5 standardized steps : the definition of the problem, the gathering of factual informations, the analysis of the causes, the search for the solutions and finally the implementation and the verification of the effectiveness of the solution.
 
 

PHASE

OBJECTIVE

TOOLS OR SUB-STEPS

Define

Clearly define the project and build a successful working team

  • Project charter
  • Voice of the customer – Voice of the buisness
  • Process mapping
  • Value analysis
  • Qwick wins
  • Risk analysis
  • Team building

Measure

Obtain relevant factual data

  • Input, process and output indicators
  • Operational definition of the measures
  • Data collection plan
  • Base performance
  • Use graphs to assess the data
  • Measurement system analysis
  • Design of experiments

Analyze

Determine the root cause of the problem

  • Data stratification – Pareto graphs
  • Ishikawa diagram  – Fault tree analysis
  • Statistical anaysis – t-Test – Anova – Correlation – SPC
  • Analyse DOE results
  • Root cause analysis
  • Root cause validation

Improve

Identify the right solution

  • Generate solutions – Benchmarking – Creativity tools  – Analytical thinking
  • Cost-Benefit-Impact analysis
  • Solution selection process
  • Mapping of the new process
  • FMEA of the new process

Control

Implement the solution and control its effectiveness

  • Run a pilot trial
  • Validate the effectiveness of the solution
  • Implement the final solution
  • Set up a control plan
  • Document
  • Assess replication opportunities
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Get in touch

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Contact details

  Address :

19, rue de Lumechon

7160 - Godarville - Belgium

  Email :

contact@leansigmafocus.be

  Phone :

+32 488 34 85 33

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