Six Sigma seeks to identify and systematically remove the causes of defects and errors in any process from the manufacturing floor to more general types of business processes which can ultimately impact on customer satisfaction.
Originally developed by Motorola, Six Sigma has two key methods called DMAIC and DMADV, both inspired by W. Edwards Deming’s Plan-Do-Check-Act Cycle:
DMAIC consists of the following steps:
- Define the process improvement goals required
- Measure key aspects of current processes.
- Analyze the data gathered in order to verify all relevant cause-and-effect relationships
- Improve or optimize the process through lean techniques
- Control the process to ensure that deviations are consistently reduced over time
DMADV, also known as DFSS (Design for Six Sigma), consists of the following steps:
- Define the design goals
- Measure and identify CTQs (characteristics that are Critical To Quality), capabilities and risks.
- Analyze to develop and design alternatives resulting in the selection of the best design.
- Design details, optimize the design, and plan for design verification.
- Verify the design though pilot runs before introducing to your production process
Lean Business Systems provide training to companies in Six Sigma as well as a comprehensive range of courses which are designed for individuals or organizations who want to be introduced to the subject of Lean implementation or those who are already on the “Lean road” and want to enhance their skills. See our page on Lean Training for more details.
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Institute of Industrial Engineers in Ireland
