One of the first business management consultants was Frederick Taylor. Taylor was an industrial-era management thinker who worked with factories to ensure maximum efficiency in their production processes. By assigning highly-specialized tasks to the employees in the factory, he managed to shave off significant amounts of time from overall production.
Taylor applied scientific principles to his observations about the production process. From those observations, he then wrote The Principles of Scientific Management, published in 1911. In the process, his ideas helped shape current management theory.