What is Lean Six Sigma?

What is Lean Six Sigma?

Lean Six Sigma

To improve productivity and to meet the customer’s satisfaction, the manufacturers and service providers are using different kinds of managerial approaches. Six Sigma is one of those approaches to provide almost zero defects products/services.

In this article, we will have a clear glimpse of Six Sigma as well as Lean Six Sigma. 

So let’s start…

What is Six Sigma?

Six Sigma is a managerial approach to reduce the probability of an error or defect to occur. It was first designed by Bill Smith, an American engineer at Motorola in 1986. Since then, it has been adopted by several reputed industries like General Electric, Toshiba, etc.

Six Sigma concerned with the process improvement with the help of different tools and techniques. Six Sigma sometimes is also known as the process of Operational Excellence, Zero defects, and Customer perfection.


          Six Sigma improved the probability of a system to produce defect-free product/services up to 99.99966% that’s mean the system tends to produce 3.4 defects per million opportunities or 3.4 DPMO only.

The objective of Six Sigma

“To create such an environment that help to produce almost defects free products/services.”

Lean Six Sigma

Lean Six Sigma is a hybrid approach that includes the application of Six Sigma within a Lean manufacturing environment. Whereas Six Sigma focus only on the waste associated with defects, Lean Six Sigma works on the reduction of all 8  type of waste collectively known as Muda.

***Lean Six Sigma = Lean Manufacturing + Six Sigma***

How Six Sigma Works?  

This is one of the most asked questions with the simplest answer. Six Sigma makes use of different methodologies for a new process and for improving the existing one respectively. 

  • DMAIC 

Let’s have a look at these available methodologies separately.

Method 1.    DMAIC 

Simply, This method is used to improve the existing process. DMAIC is an acronym for Define, Measure, Analyze, Improve, and Control. It is a five-step method and also known as a data-driven improvement cycle.

Let’s check out all the five steps individually.

  • Define:- Defective process is identified.
  • Measure:- Process performance is measured using different tools and techniques.
  • Analyze:- Process is properly analyzed to find out the root cause of variation/defects which leads to poor performance.
  • Improve:- Process optimization takes place by eliminating the root cause of variation/defects.
  • Control:- Controlling the improved process to keep it at its current level.

Method 2.    DMADV 

This method is also known as DFSS (Design For Six Sigma) and used for the creation of a new process. DMADV is an acronym for Define, Measure, Analyze, Design, Verify. Again it is a five-step method.

Let’s check out all the five steps individually.

  • Define:- Need for the new Process is defined.
  • Measure:- Different parameters are quantified to set the performance goal.
  • Analyze:- Proper analysis of parameters to meet the performance goal.
  • Design:- Designing the process with required parameters.
  • Verify:- Trail run of the process to verify if it is according to the plan.


The application of Six Sigma (SS) or Lean Six Sigma (LSS) to any farms or industries offers the following advantages over the conventional system.

  • Product/Service Quality gets improved
  • Reduction in the waste occurs
  • Optimization of resources take place
  • Cost of the product/Services get reduced
  • The productivity of farm/industry get improved
  • Enhanced Customer’s Satisfaction
  • Competitive edge

Note:- Reduction in the waste means better utilization of resources, further better utilization of resources leads to reduced costs and improved productivity. Got it…

Future Scope

As the customized demand is increasing day by day and putting pressure on manufacturers/ service providers to optimize their resources so that they can sustain the competition, the use of Six Sigma and Lean Six Sigma provides a unique solution to unleash this pressure.

This is all about  A Brief of Lean Six Sigma.
Hope you find it useful.
Happy learning 

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