 |
|||
| Achieving Six Sigma | Six Sigma Methodology | What is Six Sigma? | Overview of Six Sigma |
|
|
|||
|
|
Why the Number Six? The phase Six Sigma comes from the statistical basis of the approach and methodology used to address two concerns: 1. The performance of distinctive behaviors. 2. The natural increased on variation in each distinction over duration of time. The Sigma Scale is a recognizable measure of how well a critical product performs compared to the requirements of that product. The larger the Sigma number or score, the better the performance or capability. For instance, if a product or business has a discrepancy of 31%, then this company has an operation score of Two Sigma. However, if this same company operates at 93.3% compliance then it has a score of Three Sigma. Below is a chart that may visualize this better: SIGMA % Discrepancy Defects/Million 2 31% 308,538 3 6.7% 66,807 4 0.62% 6,210 5 0.023% 233 6 0.00034% 3.4 If a company operates at Three Sigma, then 6.7% of the time it is operating outside its acceptable tolerance. This could occur in shipping, where a product exceeds the acceptable timetable for delivery, or this could occur in manufacturing where 6.7 automobiles for every 100 that roll off the assembling line are defective. Why is six the magic number? Six was chosen because the complex products that this method originated had enough characteristics grouped together and enough long-term data that only Six Sigma would satisfy compliance. In the beginning, it was discovered that when every critical part of a system, (product, service, delivery) performed at the Six Sigma level, the risk of discrepancy in the individual parts of the system was reduced to the point that when all the parts were assembled the overall product/ system performed at an exceptional rate. The performance of the overall system remained extremely high even when long long-term effects unavoidably entered into each characteristic. There are some companies were Six Sigma is not good enough, especially where human life is concerned. These companies strive for 100.0% efficiency instead of the 99.99966% efficiency Six Sigma.
Terms and legal info | Business info | Manufacturing info | Overview business
|
Content on this site is the opinion of the
author(s).
Be sure to contact professional advice before implementing any change to
your business.
Copyright Achieving Six Sigma .com. All
rights reserved world wide.
All trademarks and service marks are property of their particular
owners.
