Hoolduse tase

maintenance task categorizatyion by complexity; Level 1 (characterized by simple actions carried out with minimal training); Level 2 (characterized by basic actions which have to be carried out by qualified personnel using detailed procedures; Level 3 (characterized by complex actions carried out by qualified technical personnel using detailed procedures; Level 4 (characterized by actions which imply the know-how of a technique or a technology and carried out by specialized technical personnel); Level 5 (characterized by actions which imply a knowlesge held by the manufacturer or a specialized company with industrial logistic support equipment)