
What is Lean?
Lean is a philosophy aimed at eliminating waste in processes. Waste shows up as overproduction, waiting times, unnecessary motion, excess inventory, defects and inefficient ways of working. Removing that waste lets the available resources deliver as much customer value as possible, and makes the process simpler, faster and cheaper.
In the Lean Six Sigma Green Belt training you apply Lean Six Sigma directly to an improvement project in your own organisation.

Lean is based on five principles:
- Value from the customer’s perspective: understand what the customer values and align the processes with it.
- The value stream: together with the people who really know the process, map the steps needed to deliver value, and see where waste occurs.
- Flow: make sure processes run without interruption and, where possible, flow to the customer one piece at a time.
- Pull: act only when the customer asks for it.
- Strive for perfection: keep improving processes and build a culture of improvement.
The goal of Lean is as much value for the customer as possible with as few resources as possible. Organisations can then focus fully on the activities that really add value.
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What is Six Sigma?
Six Sigma improves process quality by reducing variation and defects, using data analysis and statistical methods. The goal is standardised processes with predictable results. Defects are brought down to the sigma level the organisation uses as its KPI.

The basis of Six Sigma is the DMAIC method
- Define: determine the problem, the customer needs and the goals.
- Measure: measure current performance to set a baseline.
- Analyse: analyse data to find the root causes of problems.
- Improve: develop and implement solutions for process improvement.
- Control: secure improvements for good with control measures.
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Lean and Six Sigma reinforce each other
The two methods complement each other well, because both start from the customer’s wishes, the process and improving together with employees. That way you tackle problems at the core and achieve lasting improvement.
Lean speeds up processes by eliminating waste, Six Sigma improves quality by reducing defects and variation. Together they combine speed and precision. That helps organisations raise customer satisfaction, lower costs and use resources more effectively.
Lean removes the unnecessary steps from a process, Six Sigma optimises the remaining steps for consistent results. As a result, improvements are not only made quickly, they also last.
The benefits of Lean Six Sigma
For the customer
- Better quality: fewer defects mean a more reliable product or better service.
- Faster delivery: streamlined processes serve customers faster.
- More value: by focusing on value, customers get products and services that fit their needs.
For the organisation
- Cost savings: less waste and more efficient processes save costs.
- Higher efficiency: you achieve more with the same resources.
- Satisfied employees: clear processes and less frustration.
- Competitive advantage: organisations that apply Lean Six Sigma stand out for speed and reliability.
- Data-driven decisions: decisions are better founded thanks to statistics and analysis.

Implementing Lean Six Sigma in practice
Implementing Lean Six Sigma takes a well thought-out approach. It is an investment not only in training, but also in culture change: mastering the method and embracing the mindset and behaviour that come with continuous improvement.
The main steps are:
- Education and training: invest in training and certifying employees. Common levels are Yellow Belt, Green Belt and Black Belt.
- Choosing projects: start with processes that clearly have room for improvement, and set clear, measurable goals.
- Using tools: Lean Six Sigma offers many tools, such as value stream analysis, Kaizen events and control charts.
- Involvement: success depends on employees and managers at every level. Bring everyone along in the improvement process.
- Continuous improvement: Lean Six Sigma is not a one-off project. Keep measuring, analysing and optimising.
Conclusion
Lean Six Sigma is more than a method: it is a way of working built around continuous improvement. By combining Lean’s focus on speed with the precision of Six Sigma, organisations increase their efficiency and effectiveness. That leads to more satisfied customers, lower costs and a stronger competitive position.
Whether in manufacturing, services or logistics: Lean Six Sigma is a proven approach to lasting results.
Curious how Lean Six Sigma can help your organisation work more efficiently and with a stronger customer focus? Contact us for more information about our training courses, implementation programmes and certifications.
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