The Dabbawala system has been operating in Mumbai for over 120 years, delivering home-cooked meals to office workers. It uses a low-tech coding system and relies on local trains for transportation. Dabbawalas have achieved extremely high performance levels with almost zero errors, while keeping operational costs very low through strategies like minimizing capital investment, using existing infrastructure, and avoiding dependence on technology. Their success is attributed to strong principles like commitment to customers, cooperation within groups, and maintaining a flat organizational structure that allows for fast decision-making.