The length of time required to become proficient in the various occupations is about as follows: 43 per cent, of all the jobs require not over one day of training; 36 per cent, require from one day to one week; 6 per cent, require from one to two weeks;... My Life and Work - Page 108by Henry Ford, Samuel Crowther - 1922 - 289 pagesFull view
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Samuel Crowther - Automobile industry and trade - 1924 - 289 pages
...hundred per cent. The tubercular employees— and there are usually about a thousand of them— mostly work in the material salvage department. Those cases...from one to six years. The last jobs require great skill— as in tool making and die sinking. The discipline throughout the plant is rigid. There are...