" Time was minutely calculated everywhere in the vast plant so that top managers knew precisely what everyone was supposed to be doing at a given moment. Bell was struck, for instance, by how General Motors “divides the hour into ten six-minute periods…the worker is paid by the numbers of tenths of an hour he works.”27 This minute engineering of work time was connected to very long measures of time in the corporation as well. Seniority pay was finely tuned to the total number of hours a man or woman had worked for General Motors; a laborer could minutely calculate benefits of vacation time and sick leave. The micrometrics of time governed the lower echelons of white-collar offices as well as manual labor on the assembly line, in terms of promotion and benefits. "

― Richard Sennett , The Corrosion of Character: The Personal Consequences of Work in the New Capitalism