Sunday, June 12, 2016


Six sigma is set of techniques and tools to maintain quality of manufacturing or serving processes in industry. It was developed at Motorolla but was later adopted by General Electric and other companies.

The Six Sigma follows two processes.
  • DMAIC for existing processes - define, measure, analyze, improve and control
  • DMADV for new process - define, measure, analyze, design and verify.
Sigma is statistical term that measures how far something deviates from average. Six sigma process means a process that has no more than 3.4 defects per million oppurtunities. The idea behind six sigma is that you can measure how many defects in your process and figure out how to eliminate them.


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