Six Sigma

Six Sigma (6σ) is a process improvement technique created Bill Smith of Motorola in 1980. Six Sigma seeks to improve the quality of the output of a process by identifying and removing the causes of defects and minimizing variability in manufacturing and business processes.

For existing business processes, the Six Sigma approach is:

The DMAIC project methodology has five phases:

  • Define the system.
  • Measure key aspects.
  • Analyze the data to investigate and verify cause-and-effect relationships.
  • Improve or optimize the current process based upon data analysis.
  • Control the future state process to ensure that any deviations from the target are corrected before they result in defects.