Many auto shops that promise oil changes in 30 minutes or less assign one person to put the car on the lift, a second to drain the old oil, a third to put in new oil, and a fourth to be sure the other jobs have been done and to check the other lubricants. This method of breaking down a job into these various elements is known as A. job enlargement. B. job enrichment. C. time and motion studies. D. simplification and specialization.