<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Six Sigma (6σ) is a set of techniques and tools for process improvement . It was introduced by engineers Bill Smith & Mikel J Harry while working at Motorola in 1986 . Jack Welch made it central to his business strategy at General Electric in 1995 . </P> <P> It seeks to improve the quality of the output of a process 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 . Each Six Sigma project carried out within an organization follows a defined sequence of steps and has specific value targets, for example: reduce process cycle time, reduce pollution, reduce costs, increase customer satisfaction, and increase profits . </P>

What is the main focus of six sigma in an organization
find me the text answering this question