Soon I will add Case Studies about Quality in the Service Industry, the one that I really enjoy since my early years at the University; I just added an extract of an article about Quality of Services that I published back in 2005: "A Quality of Services Assessment using multivariate techniques", Marketing Research (ISSN: 1131-6144), a World-Renowned Scientific Magazine; ISSN 1131-6144, Nº. 88. Referenced in: Research & Marketing.
Division of Labor.
In his book "The Wealth of Nations," Adam Smith  begins with a famous passage on the specialization of labor in the production of pins.
Smith, describing the work in a pin factory, stated: "A man pulls the wire, another straights it, a third takes out another point and crushes it to put on a head end".
Eight men working thus manufactured 48,000 pins in a day. However, as Smith explained, if all had worked separately, independently, each would have produced, only 20 pins per day.
As Smith noted, the big advantage of the division of labor and specialization is that, by breaking down the total work in small operations, simple and separate, in which individual workers can specialize, overall productivity is multiplied geometrically.
“If I have seen further it is by standing on the shoulders of Giants.” Isaac Newton,
Even before Newton..., He was only making a quote..., which reaffirms what Harry S. Truman said...hmm!, or the other way around?!,