Close this search box.

Table of Contents

Lean Six Sigma


Lean Six Sigma is a business management strategy that combines two methodologies: Lean and Six Sigma. Lean focuses on reducing waste and improving efficiency in processes, while Six Sigma aims to reduce variation and defects in outputs. Together, Lean Six Sigma is a powerful approach for increasing efficiency, minimizing errors, and improving overall product quality in an organization.


The phonetics of the keyword “Lean Six Sigma” are: Lean: /liːn/Six: /sɪks/Sigma: /ˈsɪɡmə/

Key Takeaways

  1. Lean Six Sigma is a methodology that combines the principles of Lean Manufacturing and Six Sigma to improve processes, eliminate waste, and reduce variability.
  2. Its primary goal is to enhance efficiency and effectiveness in organizations through continuous improvement and the pursuit of quality.
  3. Lean Six Sigma uses a structured approach called DMAIC (Define, Measure, Analyze, Improve, Control) to guide the problem-solving process and achieve the desired outcomes.


Lean Six Sigma is important in business and finance because it combines two powerful methodologies, Lean and Six Sigma, to reduce waste, streamline processes, and enhance performance. By focusing on continuous improvement and data-driven decision-making, it promotes efficiency, productivity, and customer satisfaction. Implementing Lean Six Sigma techniques helps organizations identify and eliminate the root causes of problems, thereby minimizing defects, reducing costs, and improving overall performance. In a competitive marketplace, an effective Lean Six Sigma approach can provide a crucial advantage, leading to greater profitability and long-term success.


Lean Six Sigma is a methodology that aims to streamline business processes, reduce waste, and improve overall efficiency and quality. Its purpose is to create better value for customers, stakeholders, and the organization by combining the principles of Lean Manufacturing and Six Sigma. Lean Manufacturing focuses on eliminating waste and non-value-added activities in a production process, while Six Sigma emphasizes reducing process variation and driving quality improvements. By merging the two approaches, Lean Six Sigma enables companies to maximize their operational performance and achieve more consistent, high-quality outputs. Organizations across various industries implement Lean Six Sigma to optimize their operations and drive continuous improvement. The methodology can be applied to various functions, such as manufacturing, supply chain management, finance, and human resources. Lean Six Sigma projects typically follow the structured DMAIC framework, which stands for Define, Measure, Analyze, Improve, and Control. This data-driven framework helps organizations identify the root causes of process inefficiencies, develop appropriate solutions, and implement sustainable improvements. By employing Lean Six Sigma practices, organizations can reduce cost, improve customer satisfaction, increase profitability, and foster a culture of continuous improvement throughout the organization.


1. General Electric: Lean Six Sigma was popularized by General Electric (GE) in the 1990s under the leadership of CEO Jack Welch. GE applied Lean Six Sigma methodologies to streamline its production processes, reduce defects and waste, and improve product quality. By focusing on continuous improvement, GE saved billions of dollars and increased its efficiency and profitability. This success story helped attract attention to Lean Six Sigma as an effective business strategy. 2. Motorola: Lean Six Sigma has its roots in the Motorola Corporation, which originally developed the Six Sigma methodology to improve their manufacturing processes in the 1980s. Motorola used statistical methods to analyze and reduce defects in their products, focusing on reducing the variability in production processes. They combined their Six Sigma practice with Lean Manufacturing principles, aimed at streamlining production and reducing waste. Their efforts led to a significant reduction in defects, substantial cost savings, and increased customer satisfaction. 3. Starwood Hotels & Resorts: In the early 2000s, Starwood Hotels & Resorts began incorporating Lean Six Sigma methodologies into various sectors of their hospitality business, including hotel operations, sales, and finance. They trained employees at all levels to identify and eliminate waste, reduce lead times, and improve their overall service quality. As a result, Starwood increased customer satisfaction, improved staff productivity, and enhanced their bottom line. This example demonstrates how Lean Six Sigma can be applied outside of manufacturing, offering value to service-based industries as well.

Frequently Asked Questions(FAQ)

What is Lean Six Sigma?
Lean Six Sigma is a proven methodology that combines the principles of Lean Manufacturing and Six Sigma to eliminate waste, reduce variations, and improve the efficiency and effectiveness of business processes. It aims to achieve maximum customer satisfaction by minimizing errors and enhancing the overall quality of products or services.
How does Lean Six Sigma work?
Lean Six Sigma works through a structured, data-driven approach by utilizing the DMAIC (Define, Measure, Analyze, Improve, and Control) framework. This methodology focuses on identifying process inefficiencies, determining root causes, implementing solutions, and monitoring improvements to ensure long-term sustainability.
Who can benefit from Lean Six Sigma?
Organizations of all sizes, across various industries, can benefit from Lean Six Sigma by streamlining their processes, reducing operational costs, improving customer satisfaction, and achieving better overall performance. It can be deployed in manufacturing, healthcare, service industry, finance, and many other sectors.
What are some key principles of Lean Six Sigma?
The key principles of Lean Six Sigma include:1. Focus on the customer: Ensure that the needs and satisfaction of the customer are at the forefront of every decision.2. Identify and eliminate waste: Find and remove non-value-added activities that consume resources without providing value to customers.3. Manage variation: Reduce variations in processes to improve consistency and quality.4. Utilize data-driven decision-making: Use measurable data to drive improvement efforts and validate solutions, rather than relying on gut feelings or opinions.5. Continuous improvement: Foster a culture of ongoing improvement to maintain a competitive edge and ensure consistent progress.
Are there certification levels in Lean Six Sigma?
Yes, there are different levels of Lean Six Sigma certifications: White Belt, Yellow Belt, Green Belt, Black Belt, and Master Black Belt. Each level represents the individual’s knowledge, skills, and expertise in Lean Six Sigma principles and tools.
How long does it take to implement Lean Six Sigma?
The duration of a Lean Six Sigma implementation depends on factors such as the size and complexity of the project, the scope of improvements, and the commitment from the organization’s leadership. Smaller projects may take a few weeks to a few months, while larger initiatives can last several months to a few years.
What are some common tools used in Lean Six Sigma?
Some widely used tools in Lean Six Sigma include:1. Process Mapping: A visual representation of the steps in a process, used for identifying improvement opportunities.2. Value Stream Mapping: A tool for analyzing the flow of materials and information within a process, from the supplier to the customer, to highlight value-adding and non-value-adding activities.3. Kaizen: A continuous improvement approach that involves small, incremental improvements to streamline processes.4. Root Cause Analysis: A systematic technique for identifying the primary cause of a problem and eliminating it.5. Pareto Analysis: A technique based on the 80/20 rule, which states that 80% of effects come from 20% of causes, to highlight the most significant areas for improvement.6. Control Charts: A statistical tool for monitoring process performance over time and detecting unusual variations.

Related Finance Terms

  • Process Improvement
  • Statistical Analysis
  • Waste Reduction
  • Quality Control
  • Continuous Improvement

Sources for More Information

About Our Editorial Process

At Due, we are dedicated to providing simple money and retirement advice that can make a big impact in your life. Our team closely follows market shifts and deeply understands how to build REAL wealth. All of our articles undergo thorough editing and review by financial experts, ensuring you get reliable and credible money advice.

We partner with leading publications, such as Nasdaq, The Globe and Mail, Entrepreneur, and more, to provide insights on retirement, current markets, and more.

We also host a financial glossary of over 7000 money/investing terms to help you learn more about how to take control of your finances.

View our editorial process

About Our Journalists

Our journalists are not just trusted, certified financial advisers. They are experienced and leading influencers in the financial realm, trusted by millions to provide advice about money. We handpick the best of the best, so you get advice from real experts. Our goal is to educate and inform, NOT to be a ‘stock-picker’ or ‘market-caller.’ 

Why listen to what we have to say?

While Due does not know how to predict the market in the short-term, our team of experts DOES know how you can make smart financial decisions to plan for retirement in the long-term.

View our expert review board

About Due

Due makes it easier to retire on your terms. We give you a realistic view on exactly where you’re at financially so when you retire you know how much money you’ll get each month. Get started today.

Due Fact-Checking Standards and Processes

To ensure we’re putting out the highest content standards, we sought out the help of certified financial experts and accredited individuals to verify our advice. We also rely on them for the most up to date information and data to make sure our in-depth research has the facts right, for today… Not yesterday. Our financial expert review board allows our readers to not only trust the information they are reading but to act on it as well. Most of our authors are CFP (Certified Financial Planners) or CRPC (Chartered Retirement Planning Counselor) certified and all have college degrees. Learn more about annuities, retirement advice and take the correct steps towards financial freedom and knowing exactly where you stand today. Learn everything about our top-notch financial expert reviews below… Learn More