> how is a waiter going to produce the same in four days of work than in five? By not being tired on the fifth, not taking wrong orders and not dropping glasse

> how is a waiter going to produce the same in four days of work than in five? By not being tired on the fifth, not taking wrong orders and not dropping glasses. Same as a software engineer would. I see your point tho, and it is very valid. I am just playing angels advocate here. But, iirc, earliest research on the topic was conducted in a hospital, which is a services business, same as a restaurant. Increases in production (I said production and not productivity) were found. Research is not solid.