Maybe you've never heard of them but Prince Charles has -- and timed a visit to Mumbai so he could meet dabbawallahs in that tiny mid-day window of time when they've got time.
Here's a glimpse of what they do:
Yes, they're runnin' lunch from Mom or wife to family members working outside the home or attending school, and doing it with Six-Sigma reliability (and nary a bloviating pep-session about it, either -- 'cos there are lunches to get delivered!)
Started out during the Raj; seems some of the office-working Brits in-country weren't all that happy with their nearby tiffin options and wanted a little something home-cooked. Where there's a will (and some cash), there's a way -- and it was a way Indians could pick up a few rupees from their "overstaying guests," too. But it turned out to be one of those things that, once set up, grew to bring in a steady income on tiny fees.
Probably plenty to be learned from a close study of their methods; certainly some aspects are unique, while others ought to be as familiar as the
* See comments; there are a few real delivering dairies left.