Quality and Six Sigma Quality Initiative Sigma - is most common known as a Greek letter which is used in statistics as a measure of variation, or change. Most of the people, however, dont know that is not only a symbol but it is also a method of quality. 6 Quality (Six Sigma Quality) is a management philosophy which has to lead to better employee performance and therefore completely satisfy the customer.Six Sigma Quality, or in the abbreviation 6SQ was first introduced in 1986, when Dr. Mikel J.Harry tried the first project in the Motorola Company. However, the idea if it is not new. The same, or a very similar concepts are known under different names such as Total Quality Management (TQM) or Zero-Mistake-Production. Nowadays, many companies adopted the Six Sigma Quality Philosophy, among them are General Electric (GE), BMW car producers in Germany, Navistar or Thermoking. Six Sigma involves all the employees, from the basic ones, to the top management. 6SQ requires not only training, but also the cooperation from the employees. If a company achieves 1, it will have a yield of 31% that means the business operations will be error free in 31%. Sigma on the stage two means error freeness in 69.2%, number 3 - 93.32%. All this seems to be a big improvement, but as we will see later on, it is not enough to work on the level 3, or 4, even though both of them have a very high percentage of error-freeness. Sigma step number 4 in the real numbers means 99.37% error free operations. Most of the companies, which are working under 6SQ are operating somewhere between Sigma 3 and Sigma 4. Sigma 5 means almost perfect result. 99.97% error freeness, and this seems to be a dream for most of the companies. The highest Sigma level, Sigma 6 has the yield of 99.99966%. We can summarize it in a following table.Six Sigma Quality Yield in %%131269.20393.32499.37599.97699.99As we may see, the improvement between e...
