The assessment and training plan described in Paragraph TC-2.1.1 should be aimed at ensuring that the relevant approved person maintains competence in the controlled function. Training does not necessarily just simply attendance of courses. An individual can develop skills and gain experience in a variety of ways. These could include on-the-job learning, individual study, and other methods. In almost every situation, and for most individuals, it is likely that competence will be developed most effectively by a mixture of training methods.