Hisar (Haryana), Aug 13 - Explaining the secret behind the success story of the Mumbai dabbawalas, the proverbial lunch-box carriers, a senior official of 119-year-old association, Thursday said that it was all due to their sheer discipline and hard work.

'There is a three-point formula behind our success - that is of discipline, code of conduct and hard work. The only thing that differentiates us from other organisations is the utmost importance which we give to customers' satisfaction,' Pawan G. Aggarwal, the chief executive officer of the association, told the MBA students of the Haryana School of Business in the Guru Jambheshwar University of Science and Technology (GJUST).

He said the team comprised of around 5,000 illiterate and semi-literate workers, including four women, who picked up and delivered nearly 200,000 lunch-boxes daily. The organisation received the ISO 9001 certification in 2000 for its service.