Training is teaching, or developing in oneself or others, any skills and knowledge or fitness that relate to specific useful competencies.
Training also refers to the development of physical fitness related to a specific competence, such as sport, martial arts, military applications and some other occupations.
In military use, training means gaining the physical ability to perform and survive in combat, and learn the many skills needed in a time of war.
Occupational diving, rescue, firefighting and operation of certain types of machinery and vehicles may require assessment and certification of a minimum acceptable competence before the person is allowed to practice as a licensed instructor.
Usually, a professional trainer (or sometimes an experienced and skilled employee) serves as the instructor using hands-on practical experience which may be supported by formal classroom presentations.
This is particularly common in the training of skills requiring a very high degree of practice, and in those which include a significant responsibility for life and property.
An advantage is that simulation training allows the trainer to find, study, and remedy skill deficiencies in their trainees in a controlled, virtual environment.
This also allows the trainees an opportunity to experience and study events that would otherwise be rare on the job, e.g., in-flight emergencies, system failure, etc., wherein the trainer can run 'scenarios' and study how the trainee reacts, thus assisting in improving his/her skills if the event was to occur in the real world.
It often utilizes lectures, seminars, case studies, role playing, and simulation, having the advantage of allowing people to get away from work and concentrate more thoroughly on the training itself.
Many personnel selection companies offer a service which would help to improve employee competencies and change the attitude towards the job.