What is Six Sigma

Six Sigma originated with Motorola in the early 1980's and is a process of identifying, reducing and controlling defects using Statistical Analysis tools.

For a process to be in statistical control the defect rate will be less than 4ppm. (parts per million).  The term six sigma refers to the fact that a process in statistical control has six times the standard deviation between the mean & the Upper and Lower control limit.  i.e. it is a tight, centered distribution.

Achieving this level of success requires concerted effort and commitment throughout the organization and the application of tools such as SPC (Statistical Process Control), DFMEA (Design Failure Modes Effect Analysis), QFD (Quality Function Deployment) and many others.

Successful Six Sigma also demands close working and control of suppliers and partners to minimize defects and reduce incoming inspection.

Six Sigma is increasingly applied to service industries to ensure the customer receives an experience which exceeds her expectations. It is also combined with LEAN to give LEAN Six Sigma.

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