Six Sigma is a methodology that aims for near perfection in meeting customer requirements. It was developed by Motorola in the late 1970s and focuses on reducing costs and waste through statistical analysis and process improvement. The main steps of Six Sigma are Define, Measure, Analyze, Improve, and Control (DMAIC). Benefits include a focus on customer expectations, strong participation across the organization, and a change in culture to prioritize profit through process improvement. Leading companies continuously integrate new and older quality methods to drive business success through close understanding of customers.