What is Six What is Sigma And What Numbers Behind The Six Sigma
Sigma scale is a universal measurement scale how good are performance important characteristics compared to the required standard. The higher the sigma score the more capable our process. Example if the production defect up to 69% then said to be at the level of one sigma. But if the defect is only 6.7%, it is said to be on the level of three sigma.
The complete order achievement of six sigma as follows;
one sigma = 69% defect comparable to 691.462 PPM
two sigma = 31% defect comparable to 308.538 PPM
three sigma = 6.7% defect comparable to 66.807 PPM
four sigma = 0.62% defect comparable with the 6.210 PPM
five sigma = 0023% defect comparable to 223 PPM
six sigma = 0.00034% defect comparable with the 3.4 PPM
seven sigma = 0.0000019% defect comparable with the 0.0019 PPM
The inventors six sigma find that when they try to achieve six sigma levels, the risk of individual error is small enough (0.00034% or 3.4 defects per million opportunities), which is achieved when all parts assembled all together, overall system performance remains satisfactory. Even when the long-term effects taken into account, the overall performance was still very satisfying. That’s why six is a magic number.
Do you know, Why six sigma not five sigma?. For a complex product where Six Sigma was first discovered, there have enough characteristics that relate to one another and enough time to get a six sigma. Four or five sigma is not enough to accommodate two of these points. That’s why we call six sigma
For the case of service companies that adopt Six Sigma. System and environment is not complex enough. They do not have enough critical factor. So no need to have the critical factor of up to six sigma. Four or five sigma is enough.
However, echo the success of the implementation of Six Sigma has a strong blow. And almost all companies large or small, complex or simple, they are familiar with Six Sigma benefits when the target is achieved. Even if the result of six sigma is not reached, all the results already achieved a great achievement.
There are a few large companies able to exceed the target of six sigma in their final product, service. Especially when it comes to human safety. For example: Did you know that you are 2,000 times more surely reach your destination flights instead of your luggage?. That’s because of operational aircraft has more than six-sigma level, while your luggage may only four sigma level.
Comparison between 99% Good (3.8 sigma) with a 99.99966% Good (Six Sigma) is very significant, you may not think highly of this. You can see in the figure (Figure contained in the actual location of the article)
You must learn about the Basic thinking of Six Sigma. So you can learn more easily the next lesson. We collected lots of valuable material about the Online six sigma program so you can start immediately.
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