«It is a rare day indeed when a customer's deep-fried rotis fail to turn up. The sigma rating was the same as that given to the top bluechip company Motorola - not bad considering that most dabba-wallahs are illiterate.
The beauty of the system, Mr Medge explained, is the colour coding used on the top of each tiffin box. The home address, office address, railway stations of delivery and pick-up are all crunched into a small series of letters and numbers, painted by hand.
The tiffin-wallahs are self-employed. To join the profession, you need to donate 30,000 rupees (£460) to the tiffin-wallahs' union. After that you are guaranteed a monthly income of 5,000 rupees (£77) a good salary by Indian standards - and a job for life. The tiffins are delivered six days a week for the paltry sum of 150 rupees (£2.30) a month.»