Six Sigma is a quality control program developed by Motorola in 1986 that aims for near perfection by striving to reduce defects to 3.4 per million opportunities. It uses a data-driven approach to eliminate defects in processes from manufacturing to services. Six Sigma has evolved from quality control to a general business management philosophy focused on meeting customer requirements. It provides tools to analyze processes, identify issues, and drive improvements. Major companies like GE, Microsoft, and Wipro have successfully implemented Six Sigma.