سيكس سيجما, منهجية سيكس سيجما

a set of techniques and tools for process improvement, first introduced by Motorola in 1986. It seeks to improve the quality of process outputs by identifying and removing the causes of defects and minimizing variability in manufacturing and business processes. It uses a set of quality management methods, mainly empirical, statistical methods, and creates a special infrastructure of people within the organization who are experts in these methods.