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.