The dabbawalas are a lunch delivery system in Mumbai, known for their efficiency and six sigma performance, delivering 200,000 to 400,000 lunchboxes daily with a minimal operational cost. Their unique organizational structure and commitment to customer satisfaction have led to a near-zero error rate despite high turnover challenges. They emphasize low costs, fast decision-making, and employee ownership, serving only their core competency of food delivery while also engaging in community support activities.