Category Archives: Six Sigma

DMAIC Process & Method

DMIAC was introduced by Motorola for six sigma projects in 1980.Since then it is the important character of six sigma projects.
It refers to a data driven life cycle approach to six sigma projects for improving process.

The process steps are:

  • Define

First to define the project purpose,scope, and its objectives.For example who your customers are, and what their requirements are for your products and services, what their expectations. Define your project boundaries,what you strive to achieve,and what you won’t and specify the process that needs improvements.

  • Measure

In the beginning when things are not clear we need to define the process but after making the road maps the next step is to measure that how well the process are …

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Improvement Methods of Six Sigma


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Six Sigma Calculator Excel

The six sigma calculator can be used to calculate the sigma value.

By entering the total opportunities and number of errors, it gives you the Defects per million opportunities (DPMO), defects percentage, % yield and sigma level.

Please download the excel version of the calculator here 6 Sigma Calculator

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Phases of Six sigma

phases of six sigma

 1. Define

The customer, their problem and the processes or services involved. The scope and project objectives, determine the exact project problem and goal.
For example,: why is there such a large variation of salesperson’s performance?
2. Measure

The performance of the process or service involved, the process variables (Xs) and outputs (Ys).
Determine what, when and how frequently to assess, establishing the baseline performance of the process to demonstrate (eventually) what has improved (without measurement you cannot improve).

For example : The top five percent of the  salespersons provide ninety percent of the sales volume.

3.  Analyze

The gathered information and data is analyzed to decide the main sources of variations like the root causes which are the reasons

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Process Variations in Quality


Variation is defined as deviation from expectation. Every process and activity has inherent variation.

Examples of Variation

  • If you’re making transistors, every transistor will vary slightly.
  • If you’re swinging a baseball bat, every swing will be different from the swing before it.
  • And if you’re signing your name, every signature will contain subtle differences that no other signature will possess.

Variation is unavoidable and inevitable.

But the purpose of six sigma is to control the variations as much as you can.Some variation is probably fine. A bit much leads to the defects which needs to be fixed.…

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