The above mentioned problem can be removed by providing off-the-job training to the workers. In this regard, vestibule training can be provided to the workers since the machines are hi-tech and sophisticated. The vestibule training will help in reducing the frequent visit of engineer and save the high overhead charges as in this type of training, dummy models of real working environment are created in classrooms outside the workplace. The trainees are made to work on the dummy machines and equipment, and only when they acquire adequate expertise in their use they are shifted to the actual workplace.