dabbawallas are almost all men. they come from poor families in villages outside mumbai, and most of them have not had much schooling. many cannot read or write at all. but their system works almost perfectly, thanks to good timing,strong teamwork, and a special code with numbers and colors. business schools in england and Us have studied the system. according to these studies, the lunch boxes are delivered to the right place 99.9999 percent of the time