Workers are needed to be given appropriate training to make them learn use of machinery and most suitable method in this case is apprenticeship training. It is on-the-job method of training. The workers seeking to enter skilled traits, e.g., to become plumbers, electricians or iron workers are required to undergo apprenticeship training for a prescribed time period (which may vary from 2 to 5 years). Apprenticeship training puts the apprentices (trainees) under the guidance of a master worker or an experienced guide or trainer.