EN
The aim of this article is a presentation of methodologies which refer to improvement of processes and products defined as Six Sigma. The workers' qualifications play the essential role in the implementation of improvement projects while utilizing these methodologies. The organizations which are using Six Sigma as the tool operating improvement try to actively include all the workers in realization of these projects. The employees have to have a cycle of intensive trainings. These courses could help them to acquire the knowledge which is necessary to use the tools and techniques for the implementation of improvements.