Six Sigma
A disciplined, data-driven approach and methodology for eliminating defects in any process. The goal of Six Sigma is to improve process performance, decrease process variation, and reduce defects to no more than 3.4 per million opportunities.
Definition
Six Sigma is a quality management methodology that seeks to improve the quality of process outputs by identifying and removing the causes of defects and minimizing variability in business processes. It uses a set of quality management methods, mainly empirical and statistical methods, and creates a special infrastructure of people within the organization who are experts in these methods. Each Six Sigma project follows a defined sequence of steps and has quantified value targets.
Origin & Context
Six Sigma was developed by Motorola in 1986. It was heavily inspired by earlier quality improvement methodologies such as Total Quality Management and Zero Defects. It became famous after Jack Welch made it a central part of his business strategy at General Electric in 1995.
Why It Matters
Six Sigma provides a rigorous, data-driven framework for improving business processes. It has a proven track record of helping organizations to reduce costs, improve quality, and increase customer satisfaction. For business architects, Six Sigma is a powerful tool for process analysis and improvement.
Common Misconceptions
- Myth: Six Sigma is only for manufacturing.
- Reality: While it originated in manufacturing, it has been successfully applied to transactional processes in service industries like finance, healthcare, and logistics.
- Myth: Six Sigma is just about statistics.
- Reality: While it is data-driven, it is also a comprehensive management system that involves organizational structure, project management, and cultural change.
Practical Example
A call center wants to improve its customer satisfaction. A Six Sigma project team uses the DMAIC methodology. They Define the problem and the project goals. They Measure the current performance of the call handling process. They Analyze the data to identify the root causes of long wait times. They Improve the process by implementing a new call routing system. They Control the improved process to ensure that the gains are sustained.
Industry Applications
- Any
- Six Sigma is used in a wide range of industries, including manufacturing, automotive, aerospace, pharmaceuticals, financial services, and healthcare.
Related Terms
- Lean Management: Lean and Six Sigma are often combined into a single methodology called Lean Six Sigma.
- Business Process Reengineering: Both are process improvement methodologies, but Six Sigma focuses on reducing variation while BPR focuses on radical redesign.