What is Six Sigma and how can it be applied in practice?
*Written by: João Chang Junior, lecturer in the Production Engineering course at ESEG College
In an increasingly competitive market, companies need to be efficient, reduce costs, and consistently deliver quality.
It is in this scenario that the Six Sigma It's gaining prominence. Much more than a tool, it's a methodology that helps organizations make data-driven decisions, improve processes, and avoid waste.
If you've ever wondered What is sigma? Whether you like why so many companies adopt this model or not, the answer lies in its ability to transform results.
Six Sigma not only corrects errors, it addresses the root cause of problems, making processes more predictable, efficient, and scalable.
Throughout this content, you will understand the Six Sigma concept and how it works. DMAIC method, what is it Lean Six Sigma And why is this methodology so valued in the market?.
So, keep reading to find out more.
What is Six Sigma?
O Six Sigma, also called six sigma., Continuous improvement is a management methodology focused on the continuous improvement of processes. Its main objective is to reduce errors, waste, and costs, while simultaneously increasing quality and productivity.
When we talk about what sigma is, we are referring to a statistical concept. "Sigma" represents the standard deviation of a process, that is, the variation in relation to the expected result.
The smaller this variation, the more efficient and predictable the process. The Six Sigma concept seeks to achieve an extremely high level of quality, limiting defects to just 3.4 per million opportunities.
This high standard is what sets it apart. Six Sigma concept Unlike other methodologies, it seeks not only to improve, but to achieve operational excellence based on data and statistical analysis.
Read also: Logistics 4.0 and the role of the Production Engineer
Why is it so widely used in industry and services?
A six sigma methodology It has become one of the cornerstones of operational excellence because it helps companies solve complex problems in a structured, data-driven way.
Instead of decisions based on guesswork, everything is analyzed based on evidence.
In a competitive environment where mistakes are costly and directly impact customer experience, companies need reliable and functional processes. That's exactly what Six Sigma provides: predictability, reduced errors, and continuous improvement.
Furthermore, the method can be applied in different areas, such as:
- Industrial production;
- Logistics and supply chain;
- Customer service;
- Financial processes;
- Technology and data.
This versatility explains why large companies adopt the model as part of their organizational culture.
How can we reduce errors and waste?
The main Six Sigma tool for process improvement is DMAIC. If you've ever wondered... What is DMAIC?, This is a structured cycle for solving problems and optimizing processes in five steps: define, measure, analyze, improve, and control.
See how it works DMAIC in Six Sigma:
- Define
At this stage, the problem is clearly identified. The project objective, the impacted clients, and the success indicators are defined. - Measure
Here, data is collected from the current process. The focus is on understanding how it is working in practice. - Analyze
The information gathered previously serves as a basis for identifying the root causes of the problems. At this stage, statistical tools are used to understand why the errors occur. - Improve
Based on the analysis, process improvements are proposed and implemented. - Control
Finally, control mechanisms are created to ensure that problems do not recur and that improvements are maintained over time.
What does Six Sigma do in practice?
In practice, Six Sigma transforms the way companies deal with problems. Instead of reacting, organizations begin to act preventively and strategically.
The central objective is to achieve an extremely high level of operational quality, with a maximum of 3.4 defects per million opportunities, This directly answers the question of what the 6 sigmas are.
For example, a company can use Six Sigma to reduce delivery errors, improve customer service time, or optimize production.
Which companies use Six Sigma?
Six Sigma is used by some of the largest and most influential companies in the world. The methodology originated at Motorola, which sought to improve the quality of its products, and gained global scale when it was adopted by General Electric, becoming a benchmark in quality management.
Over time, other companies began to incorporate the model into their operations. Toyota, for example, combined Six Sigma with Lean Manufacturing, creating highly efficient systems.
Companies like Amazon, Samsung, and 3M already use this methodology to optimize processes, reduce errors, and maintain high quality standards.
In Brazil, large organizations also apply the model, such as:
- Embraer;
- Ambev;
- OK.
These companies use Six Sigma to ensure operational efficiency and maintain a competitive advantage in the market.
What is Lean Six Sigma?
Another common question is what is Lean Six Sigma? It's a combination of two powerful methodologies:
- Lean Manufacturing: Focusing on eliminating waste and improving process flow, this process is also known as lean production.
- Six Sigma: focus on reducing variations and errors
Lean seeks efficiency and agility, while Six Sigma seeks precision and quality. Together, they form a comprehensive approach to process optimization.
Companies that use Lean Six Sigma are able to:
- Reduce operational costs;
- Increase productivity;
- Improve the customer experience;
- To make more assertive decisions.
Read also: Robotics and automation: artificial intelligence in machines is transforming industry.
Conclusion
For professionals in the fields of Production Engineering, Economics, Business Administration, Computer Engineering, Data Science, or related areas, Six Sigma is highly recommended because it uses applied statistics, process modeling, process optimization, and data analysis for decision-making.
To grow in these areas, it is necessary to know how to structure a problem and solve it through appropriate methods; that is, you will develop structured thinking, a systemic vision, analytical skills, and a focus on results.
Six Sigma is not just a methodology, but a way of thinking in an increasingly data-driven world. Therefore, it is no longer a differentiator, it is a basic requirement.
Do you want to work with Six Sigma in practice?
Study Production Engineering at ESEG College. to become a well-rounded professional in process and project management.
Here you can count on the quality of the Etapa Group, as well as teachers close to you to help you launch your career!
