Six Sigma is another model for improvement. The term comes from the use in statistics of the Greek Letter (sigma) to denote Standard Deviation from the mean. 6 sigma is equivalent to 3.4 defects or errors per million.
Six Sigma is a measurement-based strategy for process improvement and problem reduction completed through the application of improvement projects. This is accomplished through the use of two Six Sigma models: DMAIC and DMADV.
- DMAIC (define, measure, analyze, improve, control) is an improvement system for existing processes falling below specification and looking for incremental improvement.
- DMADV (define, measure, analyze, design, verify) is an improvement system used to develop new processor products at Six Sigma quality levels.
Applying Six Sigma to Patient Care: