The Six Sigma DMAIC Roadmap is more than just a measurement scale and the application of statistical analysis tools. Centered on a disciplined problem solving method, Six Sigma has evolved into a powerful business philosophy and an instrument for driving cultural change. As is the case with Lean, Six Sigma also relies on the application and deployment of best management pratice in a structured manner.
The most common approach used in Six sigma is DMAIC:
- Define the Project, the Customer Requirements (CTQ) and Map the Process at a high level.
- Define the Measure, establish a valid Measurement System, collect the data and describe the distribution of the process data.
- Determine the Process Capability and identify and validate root causes of variation using Statistical Tools such as Hypothesis Testing, Regression Analysis and historical Design of Experiment.
- Develop and implement solutions using Creativity Techniques, decision making tools, Pilot testing, Design of Experiment and Simulations.
- Establish ongoing process controls to avoid the problem recurring by implementing Control Charts, assigning clear process ownership and documenting the improved work-flow.
- Each Lean Six Sigma project carried out within an organisation follows the defined DMAIC sequence of steps and has quantified value targets.