Six Sigma is a Quality Management and Improvement methodology structured to reduce product or service failure rates to a negligible level (roughly 3.4 failures per million opportunities). To achieve six sigma levels, the Six Sigma process encompasses all aspects of a business, including management, service delivery, design, production, and customer satisfaction. Six Sigma companies typically spend less than 5 percent of their revenues addressing and repairing quality problems. As a philosophy, Six Sigma drives business culture and requires a nearly flawless execution of key processes making Six Sigma a high standard for companies and individuals to achieve.