I just got back from Mumbai. Whilst out there i bumped into the dabawallahs.

Office workers in Mumbai rely on a delivery network of dabawallahs to bring them home-cooked lunch in tiffin boxes every day. From the wife's hands, each tiffin box passes through 5-10 dabawallahs before reaching its destination. Colour coding is used to determine the destination of each lunchbox. It's estimated that in Mumbai alone, 160,000 of these tiffin boxes are delivered daily, through a network of about 1,000 dabawallahs. From Rough Guide,

Tins are rarely, if ever, lost - a fact recently reinforced by the American business magazine, Forbes, which awarded Mumbai's dabawallahs a 6-Sigma performance rating, a score reserved for companies who attain a 9.99999 [sic] percentage of correctness. This means that only 1 box in 6 million goes astray, in efficiency terms putting illiterate dabawallahs on a par with bluechip firms such as Motorola.