Six Sigma is a business management strategy aimed at reducing defects to 3.4 defects per million opportunities. It sets performance goals, enhances customer value, promotes learning, and executes strategic change. The Six Sigma initiative integrates improvement teams, problem solving teams, strategic planning, and more. Mumbai Dabbawalas deliver over 175,000 to 200,000 lunch boxes daily with only one mistake per 600,000 deliveries, achieving a six sigma quality level of 99.9999%. They have received six sigma certification from Forbes and ISO certification for their outstanding service. Other companies have also adopted Six Sigma methods for production, design, services, purchasing, and more.